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“Pricing carbon correctly is a concrete and cost-effective way to slow climate change. We are wasting an opportunity to steer our economics along a low-carbon growth path and losing precious time with every day that passes.”

An abundance of carbon credits and exemptions for major emitters has plagued emission-trading systems in Europe and California, making credits cheap and hindering their effectiveness

A series of recent developments, though, have provided a glimmer of hope for would-be carbon taxes. The United Kingdom’s adoption of a carbon tax in the power sector produced a 58 percent drop in emissions from 2012 to 2016.

The biggest development of all may be in China, the world’s largest greenhouse gas emitter, which has taken steps toward its own emissions trading program. China’s move has the potential to narrow the gap between global carbon prices and climate costs to 63 percent in the early 2020s, OECD found.

The OECD report compared effective carbon rates—taxes on fossil fuels, carbon taxes and emission-trading credits—against estimated climate costs, which it projected at €30 ($35) per ton of carbon. The result is a carbon pricing gap, the difference between actual carbon rates and climate costs.

The organization found that countries with larger carbon pricing gaps tend to have more energy-intensive economies. Russia and China, for instance, have gaps of 100 percent and 90 percent, respectively, OECD found.

Less energy-intensive economies, by contrast, have less ground to make up. OECD measured the gap in Spain at 51 percent, Ireland at 42 percent and France at 41 percent

The carbon pricing gap in the United States, the world’s second-largest emitter, was 75 percent.

enewable power last year surged to 36 percent of the country's electricity use, according to the Agora Energiewende think tank. But while renewables grew in the power sector, they didn't make major strides in transport or heating, so they account for just over 13 percent of energy use.

Germany is also set to fall short of its national climate target of cutting greenhouse gas emissions by 40 percent by 2020. The new coalition government effectively abandoned that goal, instead focusing on meeting its 2030 target of reducing emissions by 55 percent. Germany is also expected to miss its emissions reduction target for sectors such as transport and buildings.

For years Germany was one of the world's energy transformation leaders. It was German cash that helped finance the technology revolution that has turned solar and wind into viable technologies that now generate increasingly cheap power

An average four-person household has to pay more than double for power in 2017 compared to 2000,"

The powerful German business lobby BDI is also unhappy, saying in a recent report that high electricity costs, delays in boosting the energy efficiency of buildings, and a “lack of vision” on transport are "worrying German industry.”

Greenhouse gas emissions in Germany have stagnated for three years in a row, rather than falling. That's largely to do with rising pollution caused by transportation, as well as a failure to reduce emissions in the buildings sector as energy consumption went up thanks to the economic recovery.

Souring opinions on diesel engines further weigh on emissions. Diesel cars emit less greenhouse gases than those powered by gasoline, which is why the country's politicians and car industry saw diesel as a panacea to deal with global warming.

But the Dieselgate scandal hammered the reputation of diesel cars, and there is growing concern about the smog that diesel generates. As cities consider banning older diesel cars, sales have fallen off a cliff. The share of diesel-fueled passenger cars in Germany was 39 percent last year, down from about 46 percent in 2016, 

"Germany missed bringing electric cars on to roads,

"In order to have an energy transition, you have to build up renewable energies, but then you also have to reduce coal, step-by-step,” Kemfert said. "That happened too late in Germany.

A lot of Germany's renewable power, especially powerful offshore wind, is generated in the north of the country. The difficulty is getting that electricity to industrial regions in the south like Bavaria.

For years Germany annoyed neighbors like the Netherlands, the Czech Republic and Poland by sending surges of electricity through their networks. They've now taken short-term measures to reduce the disruptions until the necessary transmission links are built.

domestic opposition is making it difficult for Germany to build its own north-south and other new interconnectors. The project has faced delays as people battle the idea of ugly high-voltage power lines besmirching pretty landscapes. Now much of the interconnector is due to run underground, ramping up costs.

Volkswagen's recent pledge to spend €20 billion on battery contracts and to begin making electric cars at 16 sites worldwide shows the car industry is taking steps to shift its business model — which could help secure a long-term drop in Germany's transport emissions.

Proponents of a swift coal exit, however, shouldn't hold their breath. Altmaier also said that ending coal power won't "happen suddenly and abruptly, but step-by-step over several decades."

For electric cars, lower maintenance costs and the lower costs of charging compared with gasoline prices tend to offset the higher upfront price over time. (Battery-electric engines have fewer moving parts that can break compared with gas-powered engines and they don’t require oil changes. Electric vehicles also use regenerative braking, which reduces wear and tear.)

The cars are greener over time, too, despite the more emissions-intensive battery manufacturing process. Dr. Trancik estimates that an electric vehicle’s production emissions would be offset in anywhere from six to 18 months, depending on how clean the energy grid is where the car is charging.

The new data showed hybrid cars, which run on a combination of fuel and battery power, and can sometimes be plugged in, had more mixed results for both emissions and costs. Some hybrids were cheaper and spewed less planet-warming carbon dioxide than regular cars, but others were in the same emissions and cost range as gas-only vehicles.

Lauri Myllyvirta, the centre’s lead analyst, said this was equivalent to about three months of global emissions. “These plants, if built and operated, would have emitted around 250-280 megatonnes of CO2 a year, which is roughly equal to the total emissions of Spain. Assuming an operating life of 35 years, the cumulative emissions would amount to 10 gigatonnes, or a year of China’s emissions, or three months of global emissions,”

there is evidence that 40% of the heavy equipment at new coal plants outside China and India comes from China

With coal now seemingly in terminal decline, climate activists are turning their sights towards oil, gas, and domestic coal power in China and India.

The immediate impact is likely to be felt in the countries that rely most heavily on Chinese funding for new coal projects: Indonesia, Vietnam, Bangladesh and Pakistan

Depending on implementation, other possible beneficiaries of this announcement could be the rhinos, giraffes, cheetahs and other endangered species at Zimbabwe’s Hwange national park, where two Chinese companies had hoped to extract the fossil fuel.

Another positive knock-on effect would be to push Japan to follow suit. The government in Tokyo has already taken steps in this direction but left a door open for financing by its private-sector institutions. Their geopolitical reason had been that they did not want to leave China as the only option for regional energy projects.

Despite the uncertainties over implementation, Myllyvirta said China’s announcement would accelerate decarbonisation. “Countries now know that going forward, there is no financing on the table for coal. That should clarify things a lot. Chinese delegates are going to visit Indonesia or Vietnam or Pakistan and they will be saying, ‘We don’t do coal any more, but we can help with clean energy.’ That will make a difference.”

Close to 58% of its power comes from the country’s 1,058 coal plants, almost half the total in the entire the world. This makes China far the biggest carbon emitter, pumping more than one out of every four gigatonnes that enter the atmosphere.

oughly half the country’s plants will have to close if the government 2060 net-zero target is to be achieved.

Whichever way you cut it, global warming is already happening too fast to generously support life, which our prior climate did quite well. As a feebly supportive climate devolves into an unsupportive one, it won’t matter who forecasted the timing right, only that we missed our chance at the good version of Earth.

The scientist James Hansen, famous for his early warnings about climate change, suggested in a paper released last week with a suite of high-level colleagues that warming is accelerating more rapidly than is presently understood: In their view, that the Earth could exceed 1.5 degrees of warming this decade is practically assured, and 2 degrees by 2050 is likely unless the world eliminates fossil-fuel use far faster than planned.

One expert who worked on the UN report called this “insanity,” a “climate disaster of our own making.” The climate math is not adding up.

Previous studies have warned of the ice sheet’s collapse if emissions were not drawn down; hers now suggests that we’ve passed the point of no return, that even significant emissions cuts would be too late for this particular ice sheet. (The East Antarctic ice sheet, she said, is far more stable—and good thing, because it contains enough frozen water for 10 times the amount of sea-level rise as its western counterpart.

by one estimate, the West Antarctic ice sheet contains enough water to raise sea level globally by just over five meters, or 17 feet. At the very least, Naughten told me, she thinks it would be wise to plan for two to three meters of sea-level rise, or six to ten feet, in the next couple of centuries

I shudder to think what would happen if everyone living within two meters of sea level would be displaced,” she added. That “everyone” is projected to include some 410 million by 2100.

the loss of much of West Antarctica’s ice sheet is now virtually inevitable. Even if future emissions are drastically curtailed, enough warming is probably locked in to wash the bulk of the sheet away. At best, she says, we are on the brink of its total loss becoming assured

France, Ireland, Kenya, Spain, and 12 other countries have called for a global accord to phase out fossil-fuel production. There is little doubt that this is necessary; adding more fossil fuels to the pipeline is quite obviously counterproductive to slowing, then stopping, climate change.

Yet in the U.S. alone, a country responsible for at least 20 percent of historical emissions, the current buildout of liquified-natural-gas infrastructure, intended to export the country’s plentiful gas, is the largest fossil-fuel expansion proposed in the world—and it’s happening under a president who recently passed the most impactful climate legislation the country has ever seen

China, which is responsible for about 12 percent of historical emissions according to Alex Wang, who studies Chinese environmental governance at UCLA, has one of the largest clean-power programs in the world. But the country is at the same time dramatically expanding its coal production.

the difference between the world we have and the one we could have is buried in two contrasting modeling reports by two of the world’s most important energy-information organizations.

Whereas the International Energy Agency projected that we’d hit peak fossil-fuel use in 2030, the U.S. Energy Information Administration came to a very different conclusion: It saw demand for fossil fuels rising through at least 2050

If a policy is set to expire, the U.S. EIA treats it as expiring. It doesn’t take into account policies that countries have talked about but have had yet to implement. The international agency’s analysis, in contrast, assumes countries will follow through with more climate-friendly policies and renew the ones they already have on the books. “Look how different things could be,” Bowman said. The difference is night and day, despair and hope.

Policy, and only policy, appears to make that difference. It represents the choices that our leaders make about when to finally change course.

“climate is a spectrum; it isn’t an on/off switch.” Whenever we do make a different set of decisions, ones that make the math properly compute, we will be saving what we have left, preventing some layer of livability from being irrecoverably sloughed off and swept away.

The statements of cooperation released separately by the United States and China do not include a promise by China to phase out its heavy use of coal, the dirtiest fossil fuel, or to stop permitting and building new coal plants

both countries agreed to “pursue efforts to triple renewable energy capacity globally by 2030.” That growth should reach levels high enough “so as to accelerate the substitution for coal, oil and gas generation,” the agreement says. Both countries anticipate “meaningful absolute power sector emission reduction” in this decade, it says. That appears to be the first time China has agreed to cut emissions in any part of its economy.

both countries agreed to “pursue efforts to triple renewable energy capacity globally by 2030.” That growth should reach levels high enough “so as to accelerate the substitution for coal, oil and gas generation,” the agreement says

Both countries anticipate “meaningful absolute power sector emission reduction” in this decade, it says

That appears to be the first time China has agreed to specific emissions targets in any part of its economy

As part of the deal, China agreed to set reduction targets for all greenhouse gas emissions. That is significant because the current Chinese climate goal addresses only carbon dioxide, leaving out methane, nitrous oxide and other gases that are acting as a blanket around the planet.

The United States and China also agreed that in the next set of climate pledges — which nations are supposed to put forward in 2025 — China will set emissions reduction targets across its economy. Its current pledge calls for carbon dioxide emissions to peak before 2030 but does not specify how high they might go before the curve begins to bend or specify by how much it might slash emissions.

Manish Bapna, president of the Natural Resources Defense Council, an environmental group, praised the U.S.-China agreement and called it “a foundation of ambition” ahead of the U.N. climate summit in Dubai.

The largest previous assessment of methane emissions from oil and gas in the United States, published in 2018, reviewed studies covering about 1,000 well sites, a tiny fraction of the more than one million active wells in the country. The new study, by contrast, used aerial data to examine nearly 27,000 sites from above: more than 90 percent of all wells in the New Mexico portion of the Permian Basin, which also extends into Texas.

estimated about a decade ago that the break-even point — the point above which natural gas would actually hurt the climate more than coal — was a 3.1 percent methane leakage rate. Based on more recent data from the Intergovernmental Panel on Climate Change, Dr. Howarth estimates that the threshold is closer to 2.8 or 2.9 percent.That makes the 9.4 percent leakage rate in the new study highly alarming,

Methane can be released by wells both on purpose, in a process known as venting, and through unintentional leaks from aging or faulty equipment.

Natural gas accounts for about a third of American energy consumption, and because it is less costly than coal in terms of carbon dioxide emissions, many policymakers have promoted it as a “bridge” that could do less damage to the climate while society works on a longer-term transition to renewable energy. But compared to coal, natural gas results in much higher emissions of methane, which is a more potent greenhouse gas than carbon dioxide, but doesn’t last as long in the atmosphere.

They found that a small number of wells and pipelines accounted for “the vast majority” of methane leaks, Ms. Chen said, adding, “Comprehensive point source surveys find more high-consequence emission events, which drive total emissions.”

If there was good news in the study, it was that a small number of oil and gas sites contributed disproportionately to emissions — suggesting that, if the worst offenders change their practices, it is possible for the industry to operate more cleanly.

The Stanford researchers emphasized that the same methodology they used to quantify methane emissions could be used to identify problem sites and target regulations accordingly.“Aerial technology found high methane emissions,” Ms. Chen said, “but can also help fix them cost effectively.”

only about 1 trillion tons of carbon can be burned and the resulting gas spewed into the atmosphere.

Just over half that amount has already been emitted since the beginning of the Industrial Revolution, and at current rates of energy consumption, the trillionth ton will be released around 2040, according to calculations by Myles R. Allen, a scientist at the University of Oxford and one of the authors of the new report. More than 3 trillion tons of carbon are still left in the ground as fossil fuels.

To keep using fossil fuels beyond the trillionth ton of emissions, companies would have to develop potentially expensive technology to capture carbon dioxide from emissions sources like power plants and store it underground.

But a considerable body of research suggests that in principle it could be done, and in the United States, the Obama administration is moving toward rules that would essentially require utilities to develop the technology if they want to keep burning coal to produce electricity. In response, the president’s Republican opponents have accused him of waging a “war on coal.”

The group has now issued five major reports, each of them finding greater certainty that the world is warming and greater likelihood that human activity is the principal cause. The new report finds a 95 to 100 percent chance that most of the warming of recent decades is human-caused, up from the 90 to 100 percent chance cited in the last report, in 2007.

“If current trends in carbon dioxide emissions continue, we will be pushing most of the ecosystems of the world into climatic conditions that they have not experienced for many millions of years,”

Dr. Mora and his students divided the earth into a grid, with each cell representing 386 square miles. Averaging the results from the 39 climate models, they calculated a date they called “climate departure” for each location — the date after which all future years were predicted to be warmer than any year in the historical record for that spot on the globe.

The results suggest that if emissions of greenhouse gases remain high, then after 2047, more than half the earth’s surface will experience annual climates hotter than anything that occurred between 1860 and 2005, the years for which historical temperature data and reconstructions are available.

climate departure for New York City will come in 2047, the paper found, plus or minus the five-year margin of error. But lower emissions would push that to 2072.

Under high emissions, the paper found a climate departure date of 2031 for Mexico City, 2029 for Jakarta and for Lagos, Nigeria, and 2033 for Bogotá, Colombia.

The researchers say halving emissions every decade should be complemented by equally ambitious, exponential roll-out of renewables

For example, doubling renewables in the energy sector every 5-7 years, ramping up technologies to remove carbon from the atmosphere, and rapidly reducing emissions from agriculture and deforestatio

They propose that to remain on this trajectory all sectors of the economy need decadal carbon roadmaps that follow this rule of thumb, modeled on Moore's Law.

Moore's Law states that computer processors double in power about every two years. While it is neither a natural nor legal law, this simple rule of thumb or heuristic has been described as a "golden rule" which has held for 50 years and still drives disruptive innovation

a "carbon law" offers a flexible way to think about reducing carbon emissions. It can be applied across borders and economic sectors, as well as both regional and global scales.

"Our civilization needs to reach a socio-economic tipping point soon, and this roadmap shows just how this can happen. In particular, we identify concrete steps towards full decarbonization by 2050.

no single solution will do the job, and that this deep uncertainty thus implies starting today pursuing multiple options simultaneously.

Following a "carbon law," which is based on published energy scenarios, would give the world a 75% chance of keeping Earth below 2°C above pre-industrial temperatures, the target agreed by nations in Paris in 2015

How to get there: 2020: remove fossil fuel subsidies. Put a price on carbon starting at $50 per ton rising to $400 per ton by 2050. Large-scale energy efficiency measures and large scale trials of carbon sequestration begin at 100-500MtCO2/yr.

even if there are times when renewables can supply nearly all of the electricity on the grid, the variability of those sources forces Germany to keep other power plants running. And in Germany, which is phasing out its nuclear plants, those other plants primarily burn dirty coal.

Now the government is about to reboot its energy strategy, known as the Energiewende. It was launched in 2010 in hopes of dramatically increasing the share of the country’s electricity that comes from renewable energy and slashing the country’s overall carbon emissions to 40 percent below 1990 levels by 2020 (see “The Great German Energy Experiment”

Because German law requires renewable energy to be used first on the German grid, when Germany exports excess electricity to its European neighbors it primarily comes from coal plants.

Some aspects of the Energiewende have been successful: renewable sources accounted for nearly one-third of the electricity consumed in Germany in 2015. The country is now the world’s largest solar market. Germany’s carbon emissions in 2014 were 27 percent lower than 1990 levels.

Instead of subsidizing any electricity produced by solar or wind power, the government will set up an auction system. Power producers will bid to build renewable energy projects up to a capacity level set by the government, and the resulting prices paid for power from those plants will be set by the market, rather than government fiat.

It might seem like an easy way to solve the oversupply issue would be to shut down excess power plants, especially ones that burn coal. But not only are the coal plants used to even out periods when wind and solar aren’t available, they’re also lucrative and thus politically hard to shut down.

Because fossil-fuel power plants cannot easily ramp down generation in response to excess supply on the grid, on sunny, windy days there is sometimes so much power in the system that the price goes negative—in other words, operators of large plants, most of which run on coal or natural gas, must pay commercial customers to consume electricity

Putting a steep price on carbon emissions would hasten the shutdown of German coal plants. But Europe’s Emissions Trading Scheme, designed to establish a continentwide market for trading permits for carbon emissions, has been a bust. Prices for the permits are so low that there is little incentive for power producers to shut down dirty plants.

Also helpful would be a Europewide “supergrid” that would enable renewable power to be easily transported across borders, reducing the need for reliable, always-on fossil fuel plants to supplement intermittent electricity from solar and wind.

major upgrade of its previous commitment to reducing greenhouse gases, and necessary if the world hopes to keep a global temperature rise well below 2 degrees

Japan is the world’s fifth-largest emitter of greenhouse gases. It had previously said it would go carbon neutral “at the earliest possible date,” vowing to reduce greenhouse gas emissions 80 percent by 205

Joseph R. Biden Jr., his challenger in the presidential election, has vowed to restore the United States’ participation in the accord.

reinforced just how much of an outlier the United States, the world’s second-largest carbon emitter

decision was most likely driven by a combination of domestic and external political pressures

As a developed nation, Mr. Kuramochi said, it would be “somewhat embarrassing for Japan to have a net zero emissions timeline later than China.”

he would harness the power of “innovation” and “regulatory reform” to transform the country’s energy production and usage

The country has made steady progress in reducing its emissions, but still generated 1.06 billion tons of the gas in the one-year period that ended in March 2019, placing it among the top 10 per capita emitters

By the early 2000s, Japan had made substantial progress in curbing carbon dioxide emissions through the use of nuclear power. But the meltdown of a nuclear power plant in Fukushima after a devastating earthquake and tsunami in 2011 led to a widespread shutdown of the country’s energy-producing reactors, which had generated roughly a third of Japan’s total power supply. Only a handful of the plants have since restarted.

Short on energy sources, Japan decided to reinvest in coal.

Japan currently plans to reduce — but not eliminate — its dependence on coa

The country has also vowed to end contentious government subsidies for the export of coal-fired power technology to developing nations, where the use of coal for electricity continues to rise

Further efforts to decrease Japan’s domestic commitment to coal will likely meet powerful resistance from Japanese industry, which is still heavily dependent on the fuel

Japan is already considering a substantial increase in its supply of wind and solar power, and it is also looking at newer, less-established technologies, such as plants that burn ammonia or hydrogen.

Mr. Suga said that Japan would continue to develop nuclear power with “maximum priority on safety,”

Movement toward the new goal had already started on the local level, where 150 municipal governments have pledged to be carbon neutral by midcentury.

But even if Japan achieves its goal, it will not by itself be enough to halt or even slow the current trend of global warming, a goal that requires a global effort

Preventing a climate catastrophe will require “a transformation of the energy system that has underwritten modern society,”

Japan will be carbon neutral by 2050, its prime minister said on Monday

The announcement came just weeks after China, Japan’s regional rival, said it would reduce its net carbon emissions to zero by 2060.

the broader economic and cultural landscape is so different now than it was just a few years ago that public investments of even this somewhat smaller scale appear poised to make an enormous difference.

That’s because those public investments are being made not against dirty-energy headwinds but with the support of much broader tailwinds

Thanks to technological change and the plunging cost of renewables, a growing political and cultural focus on decarbonization and increasing awareness of the public health costs of pollution and market trends for things like electric vehicles and heat pumps, it’s genuinely a whole new world out there. Not that long ago, the upfront cost of a green transition looked almost incalculably large. Today it seems plausible that quite dramatic emissions gains can be achieved for just, say, $369 billion

For 90 percent of the world, clean energy is now cheaper than dirty alternatives, and while countries like Spain are boasting about more than tripling solar power capacity by 2030, in Texas, solar output has grown 39-fold in just six years. Globally, renewable output has grown fourfold in the past decade

Ten years ago, when the United States endeavored to tackle the problem of climate change, it tried to do so largely by punishing the cost of dirty energy with a cap-and-trade system. This time, it’s giving a kick-start, or a boost of momentum, to an already ongoing green transition.

this strategic choice of carrots rather than sticks has received some deserved praise: It’s better and more popular to subsidize cheap, clean energy than it is to make the bad stuff more expensive

A “fair share” analysis suggests the United States — today the world’s second largest emitter, and historically the largest by far — should be moving faster than any nation in the world.

The models may ultimately prove optimistic, given the complications of infrastructure build-out

it is fair to wonder about the uncertain economics of some of the bill’s technological bets, like carbon capture and storage, which could allow emissions from industry and power generation to be trapped and sequestered, and which some climate activists and environmental justice advocates distrust

Jesse Jenkins, who leads the REPEAT Project, says he believes that the tech problems of C.C.S. have been solved and that, with tax credits, the bill will address its cost problem, leading to a dramatic scale-up in use. Julio Friedmann, a former Obama-era Energy Department official turned carbon removal advocate, says that a rapid scale-up of C.C.S. would be, while miraculous, also plausible.

the fact that this much climate progress appears even remotely possible for less than the annualized budget of the State Department, as Ben Dreyfuss recently put it, is a remarkable reflection of the state of green energy today, even without the new law. When it comes to emissions, we are no longer fighting an uphill battle, at least in the United States and many other countries like it. We are deciding how quickly to race downhill.

at the risk of playing Pollyanna, I think it is also possible to see the size of the bill — its relative smallness — as at least a mark of good news

The headline projection of the I.R.A. impact appears, if inadequate by the standards of the Paris agreement, nevertheless impressive: a 40 percent reduction in just eight years

already today the United States has reduced emissions 20 percent from 2005 levels, and was projected to reduce them further even without the benefit of the I.R.A. As recently as a few weeks ago, before the bill was revived, it might have felt like the United States was permanently stalled on climate action, but in fact the country was already moving to decarbonize, if not fast enough.

peed really matters; as the writer and activist Bill McKibben put it, when it comes to warming, “winning slowly is the same as losing.” Simply moving in the right direction isn’t enough, and too much time has been squandered — within the United States and globally — to avoid what was once described as a catastrophic climate future.

If the United States achieves that 40 percent reduction, that’s still well short of the country’s target of a 50-52 percent reduction by 2030. The gap may seem relatively small, but it represents more than half a billion tons of carbon each year. That’s a lot.

the I.R.A. is a compromise, obviously and outwardly, tying new leases for wind power development to new ones for oil and gas, only moderately reducing the country’s demand for oil and gas over the next decade and investing less in environmental justice measures than Biden himself promised not too long ago

But its basic bet — that many of these markets and technologies are close enough to tipping points that relatively small public support can get them racing toward inevitability — also means the ultimate impacts could be larger and far-reaching.

The effects on prices and markets could make state and local action cheaper and easier, and even federal regulation more palatable

the bill includes some unheralded provisions to help retire coal power more quickly, as Keane Bhatt, the policy director for the Progressive Caucus, has pointed out, as well as an under-discussed “stick” in the form of a fee for methane

The impact of its “green bank” and Energy Department loans could be quite large — some estimates have suggested they could run into the hundreds of billions, and the $27 billion handed to the Green Bank could catalyze ten times as much private capital

because much of the I.R.A.’s top-line “investment” comes in the form of tax credits, its outlays — and impacts — could ultimately grow substantially if certain sectors (wind, solar and C.C.S., for instance) really do take off.

This might not ultimately be just a $369 billion package, in other words, but something quite a bit bigger. Enough to get us to 50 percent by 2030? “I think we have a pretty good chance,” Jenkins says.

it is striking that, given where we were not that long ago, such a proposition seems credible at all. Here’s hoping.

The provisions tying future auctions for wind power to leases for oil and gas development have been called “poison pills,” because they appear to lock in future emissions. But the ultimate impact is likely to be quite small. (Energy Innovation estimates at most 50 million tons of additional annual carbon emissions, compared with a billion in reductions from other measures in the bill.)

So extreme is inequality that the lowest-earning 50% of the world population – 4 billion people – account for as little as 12% of total emissions.

And those at the very bottom of the pile barely register at all. Mali’s per capita C02 emissions are about one-seventy-fifth of those in the US. Even if the lowest-earning third of the global population – more than 2.6 billion people – were to raise themselves above the $3.2-a-day poverty line, it would increase total emissions by a mere 5% – that is, one-third of the emissions of the richest 1%.

Half the world’s population, led by the top 10% of the income distribution – and, above all, by the global elite – drive a globe-spanning productive system that destabilises the environment for everyone

The worst effects are suffered by the poorest, and in the coming decades the impact will become progressively more extreme. And yet their poverty means they are virtually powerless to protect themselves.

This is the triple inequality that defines the climate global equation: the disparity in responsibility for producing the problem; the disparity in experiencing the impacts of the climate crisis; and the disparity in the available resources for mitigation and adaptation.

global heating will pose huge distributional problems. How will climate refugees be resettled? How will the economy adapt?

For fragile states such as Iraq, it may prove too much. The risk is that they will tip from just about coping into outright collapse, failing to provide water and the electricity for cooling – the bare essentials for survival in extreme heat

You might say, plus ça change. The poor suffer and the rich prosper. But the consequences of the climate triple inequality are radical and new

Rich countries have long traded on unequal terms with the poor. During the era of colonialism, they plundered raw materials and enslaved tens of millions. For two generations after decolonisation, economic growth largely bypassed what was then known as the third world.

As we run ever closer to the edge of the environmental envelope – the conditions within which our species can thrive – the development of the rich world systematically undercuts the conditions for survival of billions of people in the climate danger zone

The middle 40% of the world’s income distribution now account for 41% of global emissions, meaning they have achieved a considerable level of energy consumption. But this “global middle class”, concentrated above all in east Asia, crowds out the carbon budget remaining for those on the lowest incomes, and their growth inflicts irreversible damage on some of the poorest and most disempowered people in the world.

Since the 1980s, with the acceleration of China’s economic growth, the scope of development has dramatically widened.

They are not so much exploited or bypassed as victimised by the climactic effects of economic growth taking place elsewhere. This violent and indirect entanglement is new in its quality and scale

Violent and unequal relationships between groups usually involve some degree of interaction and can, as a result, be resisted. Workers can strike.

But arms-length ecological victimisation entails no such relationship and offers correspondingly fewer channels for resistance from within the system.

can we not hope for more constructive responses to the triple inequality?

This question is still what gives such huge importance to the global climate conferences such as Cop28, which starts on 30 November. They may seem like staid and ritualistic affairs, but it is in such venues that the lethal connection between oil, gas and coal production, rich-world consumption and the lethal risks facing those in the climate danger zone can be articulated in political form.

since then the resistance of US and European negotiators has hardened. As we approach Cop28, the organisation and the financing of the fund are yet

Such a fund is no solution to the problem of the triple inequality. For that we need a comprehensive energy transition and new models of truly inclusive and sustainable development

But a loss and damage fund does one essential thing. It recognises that the global climate crisis is no longer a problem of future development. We have entered the stage where the failure to urgently address the mounting crisis becomes an active process of victimisation. A victimisation that cries out, at least, for an admission of responsibility and adequate compensation.

Adam Tooze is a professor of history at Columbia University

The biggest factor making this kind of climate initiative possible, after so many years of inaction, is the spectacular technological progress in renewable energy that has taken place since 2009 or so. This means that we can greatly reduce emissions using carrots instead of sticks: giving people incentives to use low-emission technologies rather than trying to regulate or tax them into giving up high-emission activities.

the politics of carrots are obviously a lot easier than the politics of sticks.

Above all, real G.D.P. says nothing about how stuff is produced. A kilowatt-hour of electricity counts the same whether it was generated by burning coal or wind power, but the environmental impact is completely different.

So let’s talk about why such claims are all wrong.

many people don’t understand what economic growth means, imagining that it necessarily involves producing the same things you were producing before, in the same ways, but just at a larger scale.

But that’s not at all what growth means. Currently, America’s real gross domestic product is about a third larger than it was in 2007. But the economy of 2023 isn’t just the economy of 2007 scaled up by a third. Production of some goods has gone way down — coal production has been cut roughly in half.

at this precise moment — the most hopeful moment for the environment, as far as I can tell, in decades — my inbox has been filling up with woeful claims that environmental protection is incompatible with economic growth. These claims are oddly bipartisan. Some of them come from people on the left who insist that the planet can’t be saved unless we give up on the notion of perpetual economic growth. Others come from people on the right who insist that we must give up on all this environmentalism if we want to preserve prosperity.

In fact, environmental quality is often better in rich countries, with high G.D.P. per capita, than in middle-income countries

As a result, there’s no reason a growing economy must place an increasing burden on the environment.

the environmental Kuznets curve.

, a comparison between the New York metropolitan area and Delhi, India. Delhi has a larger population but a much smaller G.D.P. So does New York’s big economy mean a highly stressed environment?

how does air quality in the two cities compare? As anyone who’s visited both places knows, New York air is, well, relatively OK, while Delhi air … isn’t.

at higher levels of development, delinking growth from environmental impact isn’t just possible in principle but something that happens a lot in practice.

Here’s a favorite chart of mine from the invaluable Our World in Data website. It shows carbon dioxide emissions per capita in Britain, where the Industrial Revolution began. The early phases of industrialization were indeed associated with a huge rise in emissions. But more recently emissions have fallen back to the levels of the ’50s — the 1850s:

How did Britain do that? Part of the answer is that over time the British economy switched from relying on coal to relying on hydrocarbons, which when burned generate less carbon dioxide. Britain also learned to use energy more efficiently over time. But more recently a big factor has been the rise of renewable energy, especially, in Britain’s case, wind power

So when you hear an environmentalist say something like, “We live on a finite planet, so we can’t have unlimited economic growth,” what they’re actually revealing is that they don’t understand what economic growth means

in practice, they’re lending aid and comfort to anti-environmentalists, who want us to believe that protecting the environment is incompatible with rising living standards.

That said, while it’s possible to decouple growth from environmental harm, that’s not automatic. To combine rising living standards with an improving environment, we need policies that encourage the use of technologies that cause less environmental damage.

The good news is that the United States is finally implementing such policies. Still, we need a lot more action along those lines — not just in America but in the rest of the world. So we can do this — but we need to try, and not give in to counsels of despair.

To achieve this goal, countries that signed on to the agreement promised that they would focus on cultivating clean, renewable energy sources and shift from the use of fossil fuels. They will also be required to report on their progress in reducing greenhouse gas emissions every five years.

The deal also commits countries to deliver $100 billion a year in aid for developing countries by 2020, with a promise to increase financing in the future.

In a preamble, the deal doubles down on a pledge made six years ago, that richer, industrialized countries will contribute at least $100 billion of aid a year to poorer nations to help them battle the effects of climate change by 2020. It also promises that countries will consider increases to that amount in the future.

So there may be many vested parties with a stake in the climate change deal -- but there are also a few key winners and losers. We take a look at them here:

According to the Internal Displacement Monitoring Centre's (IDMC) 2015 Global Estimates report, "an average of 26.4 million people per year have been displaced from their homes by disasters brought on by natural hazards" since 2008. These threatened populations are largely found in developing countries, which tend to be more vulnerable to rises in sea level, droughts, and floods.

The climate accord in Paris, however, have many in the developing world cheering.

According to President Obama, the targets are bold, but they also empower "businesses, scientists, engineers, workers, and the private sector -- investors -- to work together."

Mohamed Adow, senior climate change adviser from the disaster relief agency Christian Aid, told CBS News that this is one of the most important aspects of the COP21 accord: the promise provides poorer nations with the "assurance that the international community will not leave developing countries to deal with climate impact."

Some nations were not entirely satisfied with the final language -- there is still, after all, no legally binding provision that holds industrialized countries to this pledge for "adaptation" funds -- but nonetheless, Adow said, it gives significant hope to those countries hit especially hard with the threat of displaced citizens.

In fact, the aid money already seems to be flowing in light of the Paris negotiations: early this week, the U.S. promised to double its own aid to affected countries to $861 million as part of last-ditch efforts to push the climate deal through.

The effects of climate change in poor and developing nations also pose an increasing terror threat to the United States -- a connection that President Obama has made in the past, when he called global warming "an economic and security imperative" just weeks after the Nov. 13 attacks in Paris.

As Democratic presidential candidate Bernie Sanders explained it on CBS' "Face the Nation" in November: "If we are going to see an increase in drought, in flood, and extreme weather disturbances as a result of climate change, what that means is that people all over the world are going to be fighting over limited natural resources... When people migrate into cities and they don't have jobs, there's going to be a lot more instability, a lot more unemployment, and people will be subject to the types of propaganda that al Qaeda and ISIS are using right now."

Military reports have also viewed climate change as a "catalyst for conflict," and the Pentagon's Quadrennial Defense Review last year dubbed its effects as "threat multipliers" that ultimately lead to "conditions that can enable terrorist activity and other forms of violence."

But the climate change deal seeks to mitigate these possible conflict catalysts so that "countries that don't have the resources to address these problems head on, now will," Jon Powers, who served the Federal Chief Sustainability Officer and Special Advisor on Energy to the U.S. Army in the Obama Administration, told CBS News.

One important target put forth by the deal was to ensure that parties would "undertake rapid reductions thereafter in accordance with best available science, so as to achieve a balance between anthropogenic emissions by sources and removals by sinks of greenhouse gases in the second half of this century."

Here, the deal aims to strangle heavy carbon-emitting industries -- the "anthropogenic emissions" -- and cut down on total fossil fuels burned worldwide. Importantly, it's also a nod to investment in and development of new technologies that would remove carbon dioxide from the air.

U.S. Energy Secretary Ernest Moniz told CNBC in an interview, "We recognize fossil fuels will continue to be a part of the portfolio for quite a long time," but that the popularity of other power sources are on the rise.

"Wind energy has gone up by several fold just in the last five to six years," Moniz said, "and now (wind) provides about 4.5 percent of our electricity. You add that with solar, we're talking 5 percent."

Kathleen McLaughlin, the chief sustainability officer for Walmart, said in a statement that the company would "support the U.N.'s call for the U.S. corporate sector to commit to science-based targets to reduce emissions."

Ahead of the Paris summit, China -- the world's biggest coal consumer -- said it would aim to cut its greenhouse gas emissions by nearly two-thirds of its 2005 levels. In the past, international monitoring of those numbers would have been difficult to do, but the COP21 deal changes that.

The agreement holds nations accountable for reporting their progress on their climate goals in a global "stocktake" every five years starting in 2023. It also means countries will be monitoring, verifying and reporting their greenhouse gas emissions in a single accounting system.

According to one report released last month by the carbon investment think tank Carbon Tracker, fossil fuel companies could risk over $2 trillion dollars of current and future projects being left valueless as the market for fossil fuels narrows with recent global climate change action.

Emissions from livestock, largely from burping cows and sheep and their manure, currently make up almost 15% of global emissions. Beef and dairy alone make up 65% of all livestock emissions.

“This is not a radical vegetarian argument; it is an argument about eating meat in sensible amounts as part of healthy, balanced diets.”

agricultural emissions will take up the entire world’s carbon budget by 2050, with livestock a major contributor. This would mean every other sector, including energy, industry and transport, would have to be zero carbon, which is described as “impossible”. The Chatham House report concludes: “Dietary change is essential if global warming is not to exceed 2C.”

Meat consumption is on track to rise 75% by 2050, and dairy 65%, compared with 40% for cereals. By 2020, China alone is expected to be eating 20m tonnes more of meat and dairy a year.

preventing

This is a measure of how hot it feels when humidity is factored in with the air temperature, providing a number on a coloured scale, starting with 80F (26C) which is yellow – caution, and rising through dark yellow beginning at 91F (33C) – extreme caution, orange at 103F (39.5C) – danger, and up to red beginning at 126F (52C) – extreme danger.

The average number of days per year nationwide with a heat index above 105 degrees Fahrenheit would more than quadruple to 24 by mid-century and increase eight-fold to 40 by late century

“Our analysis shows a hotter future that’s hard to imagine today,”

The work is the first study to examine the impacts of climate change on the heat index – instead of just temperature – when calculating the impacts of warming,

“These conditions occur at or above a heat index of 127 degrees, depending on temperature and humidity. Exposure to conditions in that range makes it difficult for human bodies to cool themselves and could be deadly,”

To make this happen, we must ramp up technology to pull carbon dioxide from the atmosphere, protect the oceans and land that absorb half of our emissions already, and transform the world’s food system from a major carbon emitter into a major carbon store.

A carbon law of halving emissions every decade can be adopted at all levels: for individuals, families, communities, companies, cities and nations. Those with the biggest carbon footprint need to do the most.

nstallation of renewables in the energy sector is doubling every five to six years and has been on this course for a decade. If we keep doubling at this pace, renewables will reach 100 percent before 2050.

Climate change will make those threats even worse, as floods, drought, storms and other types of extreme weather threaten to disrupt, and over time shrink, the global food supply

food shortages could lead to an increase in cross-border migration.

A particular danger is that food crises could develop on several continents at once

“The potential risk of multi-breadbasket failure is increasing,” she said. “All of these things are happening at the same time.”

The report also offered a measure of hope, laying out pathways to addressing the looming food crisis, though they would require a major re-evaluation of land use and agriculture worldwide as well as consumer behavior

Proposals include increasing the productivity of land, wasting less food and persuading more people to shift their diets away from cattle and other types of meat.

“People’s lives will be affected by a massive pressure for migration,” said Pete Smith, a professor of plant and soil science at the University of Aberdeen and one of the report’s lead authors. “People don’t stay and die where they are. People migrate.”

activities such as draining wetlands — as has happened in Indonesia and Malaysia to create palm oil plantations, for example — is particularly damaging. When drained, peatlands, which store between 530 and 694 billion tons of carbon dioxide globally, release that carbon dioxide back into the atmosphere.

Between 2010 and 2015 the number of migrants from El Salvador, Guatemala and Honduras showing up at the United States’ border with Mexico increased fivefold, coinciding with a dry period that left many with not enough food and was so unusual that scientists suggested it bears the signal of climate change

As a warming atmosphere intensifies the world’s droughts, flooding, heat waves, wildfires and other weather patterns, it is speeding up the rate of soil loss and land degradation, the report concludes.

Higher concentrations of carbon dioxide in the atmosphere

will also reduce food’s nutritional quality, even as rising temperatures cut crop yields and harm livestock

In some cases, the report says, a changing climate is boosting food production because, for example, warmer temperatures will mean greater yields of some crops at higher latitudes. But on the whole, the report finds that climate change is already hurting the availability of food because of decreased yields and lost land from erosion, desertification and rising seas

Overall if emissions of greenhouse gases continue to rise, so will food costs, according to the report, affecting people around the world.

“You’re sort of reaching a breaking point with land itself and its ability to grow food and sustain us,”

agriculture itself is also exacerbating climate change.

the window to address the threat is closing rapidly

Every 2.5 acres of peatlands release the carbon dioxide equivalent of burning 6,000 gallons of gasoline

And the emissions of carbon dioxide continues long after the peatlands are drained. Of the five gigatons of greenhouse gas emissions that are released each year from deforestation and other land-use changes, “One gigaton comes from the ongoing degradation of peatlands that are already drained,”

(By comparison, the fossil fuel industry emitted about 37 gigatons of carbon dioxide last year, according to the institute.)

cattle are significant producers of methane, another powerful greenhouse gas, and an increase in global demand for beef and other meats has fueled their numbers and increased deforestation in critical forest systems like the Amazon

each year, the amount of forested land that is cleared — much of that propelled by demand for pasture land for cattle — releases the emissions equivalent of driving 600 million cars

The authors urge changes in how food is produced and distributed, including better soil management, crop diversification and fewer restrictions on trade

They also call for shifts in consumer behavior, noting that at least one-quarter of all food worldwide is wasted

But protecting the food supply and cutting greenhouse emissions can also come into conflict with each other, forcing hard choices. For instance, the widespread use of strategies such as bioenergy — like growing corn to produce ethanol — could lead to the creation of new deserts or other land degradation

The report also calls for institutional changes, including better access to credit for farmers in developing countries and stronger property rights

Planting as many trees as possible would reduce the amount of greenhouse gases in the atmosphere by about nine gigatons each year

But it would also increase food prices as much as 80 percent by 2050.

“We cannot plant trees to get ourselves out of the problem that we’re in,

“The trade-offs that would keep us below 1.5 degrees, we’re not talking about them. We’re not ready to confront them yet.”

Preventing global temperatures from rising more than 1.5 degrees Celsius is likely to require both the widespread planting of trees as well as “substantial” bioenergy to help reduce the use of fossil fuels

“Above 2 degrees of global warming there could be an increase of 100 million or more of the population at risk of hunger,” Edouard Davin, a researcher at ETH Zurich and an author of the report, said by email. “We need to act quickly

The same is true for planting large numbers of trees (something often cited as a powerful strategy to pull carbon dioxide out of the atmosphere), which can push crops and livestock onto less productive land

“Agricultural practices that include indigenous and local knowledge can contribute to overcoming the combined challenges of climate change, food security, biodiversity conservation, and combating desertification and land degradation,”

an average of three people were killed per week defending their land in 2018, with more than half of them killed in Latin America.

the longer policymakers wait, the harder it will be to prevent a global crisis. “Acting now may avert or reduce risks and losses, and generate benefits to society,” the authors wrote. Waiting to cut emissions, on the other hand, risks “irreversible loss in land ecosystem functions and services required for food, health, habitable settlements and production.”