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Rainforests support a vastly greater range of species than savannah and play a much greater role in absorbing carbon dioxide from the atmosphere.

Parts of the Amazon are receiving much less rain than they used to because of the changing climate.

This year’s fires in the Amazon are the worst in a decade, with a 60% increase in fire hotspots compared with last year.

We understand now that rainforests on all continents are very sensitive to global change and can rapidly lose their ability to adapt. Once gone, their recovery will take many decades to return to their original state. And given that rainforests host the majority of all global species, all this will be forever lost.”

But some research has concluded that deforestation, drying and other factors could lead to substantial forest dieback in the Amazon by the end of this century.

Covering more than two million square miles in Brazil and neighboring countries, the Amazon is the world’s largest rainforest, and serves a crucial role in mitigating climate change in most years by taking in more carbon dioxide from the atmosphere than it releases.

“That lack of resilience shows that, indeed, there is only so much of a beating that this forest can take,”

But climate change, together with widespread deforestation and burning for agriculture and ranching, has taken a toll on the Amazon, making it warmer and drier. The region, one of the wettest on Earth, has experienced three droughts since 2000.

“It’s reducing the ability to bounce back.”

The researchers found that more than three-quarters of the untouched rainforest lost resiliency over that time, and that the loss was greatest in areas that were drier or closer to human activities like logging. The study was published in the journal Nature Climate Change.

About 17 percent of the Amazon has been deforested over the past half-century, and while the pace of deforestation slowed for some years in Brazil, it has picked up again more recently

“The Amazon is already 17% deforested, so when you calculate at the current rate of deforestation, this 20% to 25% is reached in 15 to 20 years,” he said. “I hope she is wrong. If she is right, it is the end of the world.”

Lovejoy, a professor at George Mason University in Fairfax, Virginia, said that de Bolle’s projection could come true because global heating, soaring deforestation and an increase in Amazon fires have created a “negative synergy” that is accelerating its destruction

"It's really difficult," says Gegrand Joseph, 44, a Haitian who had hiked across the Darién Gap five years ago, was deported by the Trump administration and is tackling this patch of jungle a second time to get back to the U.S. "But there is no alternative."

So far this year more than 100,000 migrants have walked across the Darién Gap, more than triple the previous annual record, according to the International Organization for Migration. Many had been working in South America but lost their jobs during the coronavirus pandemic and figured that, under the Biden administration, they would have a better chance of getting into the U.S.

But the wilderness is being slowly whittled away. On the Colombian side of the border, I come across a bulldozer carving a road through the jungle. It's illegal but there are no police in sight. The area is controlled by a drug cartel called the Gulf Clan, which also makes a lot of money off the migrants.

The next day, some 700 migrants break camp and hit the jungle trails on foot, leaving behind plastic bottles, empty food tins and dirty diapers. The migrants relieve themselves in the rivers and toss camping gear and clothes into the water.

"It's sad," Villalón says of all the garbage. "You cannot drink water from the river. Two years ago I was drinking water on this same river you know. This is not a pristine jungle anymore."

But Claudio Madaune of the Darién Foundation, a Colombian conservation group, says that the pollution caused by the migrants is negligible compared to damage caused by illegal ranchers and gold miners who have moved into the area. He says the worst change is that the Darién has become far more dangerous. Gunmen frequently rob, rape and kill migrants. Government officials from Panama and Colombia have discussed setting up a boat service across the Caribbean to transport migrants between the two countries. That would reduce the risks and help protect the rainforest.

The report also condemns Donald Trump for “actively silencing” climate science, and criticises the Brazilian president, Jair Bolsonaro, for promising to open up the Amazon rainforest to mining

Alston said there were also some positive developments, including legal cases against states and fossil fuel companies, the activism of Greta Thunberg and the worldwide school strikes, and Extinction Rebellion.

t said the greatest impact of the climate crisis would be on those living in poverty, with many losing access to adequate food and water.

Developing countries will bear an estimated 75% of the costs of the climate crisis, the report said, despite the poorest half of the world’s population causing just 10% of carbon dioxide emissions.

“The risk of community discontent, of growing inequality, and of even greater levels of deprivation among some groups, will likely stimulate nationalist, xenophobic, racist and other responses.

aintaining a balanced approach to civil and political rights will be extremely complex.”

The impacts of the climate crisis could increase divisions, Alston said. “We risk a ‘climate apartheid’ scenario where the wealthy pay to escape overheating, hunger, and conflict while the rest of the world is left to suffer,

He said the most recent HRC resolution on the climate crisis did not recognise “that the enjoyment of all human rights by vast numbers of people is gravely threatened” or “the need for the deep social and economic transformation, which almost all observers agree is urgent if climate catastrophe is to be averted”.

nternational climate treaties have been ineffective, the report said, with even the 2015 Paris accord still leaving the world on course for a catastrophic 3C (equivalent to an increase of 5.4F) of heating without further action

“States have marched past every scientific warning and threshold, and what was once considered catastrophic warming now seems like a best-case scenario,” the report said.

he US president is one of the few individuals named in the report. “He has placed former lobbyists in oversight roles, adopted industry talking points, presided over an aggressive rollback of environmental regulations, and is actively silencing and obfuscating climate science.”

A state that fails to take any feasible steps to reduce greenhouse gas emissions is violating their human rights obligations.”

The administration has also canceled bidding rounds for clean-energy projects in solar and wind power, while boosting natural-gas pipelines and refineries, which experts say will complicate Mexico’s goals under the Paris Climate Accords

“It’s become clear that this guy does not care about the environment at all,” said Gustavo Alanis-Ortega, director of the Mexican Center for Environmental Rights, or Cemda, a prominent nonprofit. Adrián Fernández Bremauntz, founder and executive director of the nonprofit Mexico Climate Initiative, said he feels “totally betrayed.”

This week, the government said that it is beginning work on the Maya Train without having published an environmental impact report, as required by law.

it turns out that the way we move largely determines the way we live.

gadgets cumulatively contribute only a fraction of what we save by living in a walkable neighborhood. It turns out that trading all of your incandescent lightbulbs for energy savers conserves as much carbon per year as living in a walkable neighborhood does each week.

“gizmo green”; the obsession with “sustainable” products that often have a statistically insignificant impact on the carbon footprint when compared to our location. And, as already suggested, our location’s greatest impact on our carbon footprint comes from how much it makes us drive.

study made it clear that, while every factor counts, none counts more than walkability. Specifically, it showed how, in drivable locations, transportation energy use consistently tops household energy use, in some cases by more than 2.4 to 1. As a result, the most green home (with Prius) in sprawl still loses out to the least green home in a walkable neighborhood.

because it’s better than nothing, LEED — like the Prius — is a get-out-of-jail-free card that allows us to avoid thinking more deeply about our larger footprint. For most organizations and agencies, it is enough. Unfortunately, as the transportation planner Dan Malouff puts it, “LEED architecture without good urban design is like cutting down the rainforest using hybrid-powered bulldozers.”

10 to 20 units per acre is the density at which drivable suburbanism transitions into walkable urbanism.

“We are a destructive species, and if you love nature, stay away from it. The best means of protecting the environment is to

The average New Yorker consumes roughly one-third the electricity of the average Dallas resident, and ultimately generates less than one-third the greenhouse gases of the average American.

the American anti-urban ethos remained intact as everything else changed. The desire to be isolated in nature, adopted en masse, led to the quantities and qualities we now call “sprawl,” which somehow mostly manages to combine the traffic congestion of the city with the intellectual culture of the countryside.

New York consumes half the gasoline of Atlanta (326 versus 782 gallons per person per year). But Toronto cuts that number in half, as does Sydney — and most European cities use only half as much as those places. Cut Europe’s number in half, and you end up with Hong Kong

Paris is one place that has determined that its future depends on reducing its auto dependence. The city has recently decided to create 25 miles of dedicated busways, introduced 20,000 shared city bikes in 1,450 locations, and committed to removing 55,000 parking spaces from the city every year for the next 20 years. These changes sound pretty radical, but they are supported by 80 percent of the population.

increasing density from two units per acre to 20 units per acre resulted in about the same savings as the increase from 20 to 200.

New York is our densest big city and, not coincidentally, the one with the best transit service. All the other subway stations in America put together would not outnumber the 468 stops of the MTA. In terms of resource efficiency, it’s the best we’ve got.

most communities with these densities are also organized as traditional mixed-use, pedestrian-friendly neighborhoods, the sort of accommodating environment that entices people out of their cars. Everything above that is icing on the cake.

unless we hit a national crisis of unprecedented severity, it is hard to imagine any argument framed in the language of sustainability causing many people to modify their behavior. So what will?

The gold standard of quality-of-life rankings is the Mercer Survey, which carefully compares global cities in the 10 categories of political stability, economics, social quality, health and sanitation, education, public services, recreation, consumer goods, housing, and climate.

the top 10 cities always seem to include a bunch of places where they speak German (Vienna, Zurich, Dusseldorf, etc.), along with Vancouver, Auckland, and Sydney. These are all places with compact settlement patterns, good transit, and principally walkable neighborhoods. Indeed, there isn’t a single auto-oriented city in the top 50. The highest-rated American cities in 2010, which don’t appear until No. 31, are Honolulu, San Francisco, Boston, Chicago, Washington, New York, and Seattle.

Our cities, which are twice as efficient as our suburbs, burn twice the fuel of these European, Canadian, and Aussie/Kiwi places. Yet the quality of life in these foreign cities is deemed higher than ours by a long shot.

if we pollute so much because we are throwing away our time, money, and lives on the highway, then both problems would seem to share a single solution, and that solution is to make our cities more walkable. Doing so is not easy, but it can be done, it has been done,

They were able to reverse engineer the ancient climate by analyzing temperature-sensitive structures of lipids produced by fossil bacteria and archaea living in these bygone wetlands, and preserved for all time in the coal. The team found that, under this past regime of high CO2, in the ancient U.K., Germany, and New Zealand, life endured mean annual temperatures of 23–29 degrees Celsius (73–84 degrees Fahrenheit) or 10–15 degrees Celsius (18–27 degrees Fahrenheit) warmer than modern times.

“These wetlands looked exactly how only tropical wetlands look at present, like the Everglades or the Amazon,” Naafs says. “So Europe would look like the Everglades and a heat wave like we’re currently experiencing in Europe would be completely normal. That is, it would be the everyday climate.”

But over 50 million years ago this would have been the baseline from about 45 to 60 degrees latitude. Under this broiling regime, with unprecedented heat as the norm, actual heat waves might have begun to take on an unearthly quality.

closer to the equator in this global sweat lodge, the heat might have been even more outrageous, shattering the limits of complex life. To see exactly how hot, Naafs’ team also analyzed ancient lignite samples from India, which would have been in the tropics at the time—that subcontinent still drifting across the Indian Ocean toward its eventual mountain-raising rendezvous with Asia. But unfortunately, the temperatures from these samples were maxed out. That is, they were too hot for his team to measure by the new methods they had developed.

“Some climate models suggest that the tropics just became a dead zone with temperatures over 50 degrees Celsius (122 degrees Fahrenheit) like in Africa and South America,” says Naafs. “But we have no data so we don’t know.”

“Basically every type of paleoclimate research that’s being done shows that high CO2 means that it’s very warm. And when it gets very warm, it can be really, really, really warm.

“You start really looking into them and you go, ‘Wow. We are dealing with a rainforest.’”

“You’ve got alligators, giant tortoises, primates, things like that. We have these big hippo-like animals called Coryphodon. You have tapirs—so you’ve got tapirs living pretty close to the North Pole in the early Eocene, which today—clearly tapirs are not at the North Pole,” she says, laughing.

One obvious way to reconcile this disparity is by noticing that the changes to the ancient earth took place over hundreds-of-thousands to millions of years and (IPCC graphs notwithstanding) that time won’t stop at the end of the 21st century. The changes that we’ve already set in motion, unless we act rapidly to countervail them, will similarly take millennia to fully unfold

we’re clearly not content to stop at just 400 ppm. If we do, in fact, push CO2 up to around 1,000 ppm by the end of the century, the warming will persist and the earth will continue to change for what, to humans, is a practical eternity

Most worryingly, the climate models that we depend on as a species to predict our future have largely failed to predict our sultry ancient past.

we know methane can actually amplify high-latitude warming, so maybe that’s some of the missing feedback.

Though there are no trees here at the top of the world, there are tree stumps. And they are around 50 million years old.

Clearly we are missing something, and Naafs thinks that one of the missing ingredients in the models is methane, a powerful greenhouse gas which might help close the divide between model worlds and fossil worlds.

We know tropical wetlands pump much more methane into the atmosphere compared to [cooler] wetlands.

The last time CO2 was at 400 ppm (as it is today) was 3 million years ago during the Pliocene epoch, when sea levels were perhaps 80 feet higher than today.

Naafs thinks that many of the wildest features of the early age of mammals could be recreated.

Meanwhile, increasing the scrutiny on Microsoft’s plan are its dealings with fossil fuel companies, which have been highlighted by some as evidence of hypocrisy as it makes climate pledges. In 2019 alone, the technology company had entered into long-term partnerships with three major oil companies, including ExxonMobil, that will be using Microsoft’s technology to expand oil production by as much as 50,000 barrels a day over the coming years. The staggering amount of carbon this would release into the atmosphere would not be included on Microsoft’s expanded carbon ledger.

To begin, Microsoft will focus on protecting forests and planting trees to capture carbon. This strategy has long been used to offset emissions, but Microsoft is hoping to improve their outcomes by using remote-sensing technology to accurately estimate the carbon storage potential of forests to ensure no major deforestation is occurring in their allotments. To achieve these goals, Microsoft will be partnering with Pachama, a Silicon Valley startup that will survey 60,000 hectares of rainforest in the Amazon, plus an additional 20,000 hectares across north-eastern states of the US for the company. According to Kesley

The carbon produced when burning the biomass is captured before it is released into the atmosphere and then injected at a very high pressure into rock formations deep underground. Not only does this remove carbon from the natural cycle, the biomass absorbs CO2 as it grows.

The second concern is that the transition from coal to biofuel would require setting aside vast tracts of arable land – some estimates say one to two times the size of India.

Perhaps the most futuristic of the technologies outlined in Microsoft’s carbon negative plan is direct air capture (DAC). This involves machines that essentially function like highly efficient artificial trees, drawing existing carbon out of the air and transforming it into non-harmful carbon-based solids or gasses.

Microsoft’s plan for intensive investment in this industry is exciting for those working in the field. Klaus Lackner, a theoretical physicist working on DAC, has been arguing since the 1990s that carbon removal is the only feasible way to stop significant temperature rises. “We’ve shown that this method is technologically feasible, but nobody has wanted them,” he said. “Microsoft have said ‘we get it’. It will cost them money, but it will allow the technologie

While the technologies that Microsoft are betting on are still in their nascent stages, in the past few years there has been some encouraging progress in the negative emissions industry. Lackner and Arizona State University recently signed a deal with Silicon Kingdom, an Irish-based company, to manufacture his carbon-suck machines. The plan is to install them on wind and solar farms, and then sell the captured carbon to beverage companies to make carbonated drinks. In the UK, Drax power plant, which was once among Europe’s most polluting, transitioned from coal to biofuel this year.

Given the not insignificant risk of failure, some propose that relying on nascent or future technology as a solution to the climate crisis represents a moral hazard – the promise of carbon removal functions as an incentive for governments and major polluters to not change their behavior now.

When asked about this concern by the Guardian, Microsoft’s Joppa responded that in the short term, the energy demands of a growing global population will probably still need a mix of renewable and traditional energy sources. By remaining in discourse with these industries, he said, Microsoft hopes to help them change and transition to a better model in the future. “It’s extremely hard to lead if there’s no one there to follow,” he added.

If vaccines are the ultimate way out from this global pandemic, Brazil has a long way to go to seeing this through. As of Friday, less than 10 million people in the country of about 220 million had received at least one dose,

Only 1.57% of the population had been fully vaccinated.

That is the result of a slow rollout program that has been plagued by delays. During the announcement of its distribution plan in early February, the government promised some 46 million vaccine doses to be available in March. It's been repeatedly forced to lower that number, now estimating only 26 million by month's end.

In-country production of what the governments says will eventually be hundreds of millions of doses of the Oxford-AstraZeneca vaccine only just got off the ground. The first 500,000 doses were delivered and celebrated by top Ministry of Health officials in Rio de Janeiro this week, despite being months behind schedule.

If vaccines are to remain in short supply for the foreseeable future, the only remaining ways to control the epidemic's exponential growth in Brazil are the methods the world has heard ad nauseam -- social distancing, no large crowds, restricted movements and good hygiene.

But in many places throughout Brazil, that is just not happening. In bustling Rio de Janeiro, it is easy to find maskless crowds walking the streets, conversing in close quarters. Though the city's famed beaches are closed this weekend, restaurants and bars can still be open until 9 p.m., many likely to be filled to capacity.

Many states have imposed much harsher restrictions including nighttime curfews, but local leaders are fighting against federal leadership, or a lack thereof, determined to keep things open.

President Jair Bolsonaro, a Covid-19 skeptic who has mocked the efficacy of vaccines and hasn't publicly taken one himself, announced Thursday that he would be taking legal action against certain states in the country's Supreme Court, claiming the only person who can decree curfews is him -- something he has promised never to do.Despite thousands of people dying from the virus each day, he claims the real threat is from the economic harm virus-prompted restrictions can impose.

Millions of his supporters are following his lead, openly flaunting local regulations of social distancing and mask wearing.All of this would be concerning enough on its own, but it is exacerbated by a deeply concerning reality -- the spread of Covid-19 variants.

The P.1 variant was first discovered in Japan. Health authorities detected the viral mutation in multiple travelers that were returning from Amazonas state, an isolated region in Brazil's north replete with rainforest.

Nearly two months later, more and more research points to the P.1 variant as a crucial factor not only in the Manaus outbreak but in the nationwide crisis Brazil faces today.A study from Brazil's top medical research foundation, Fiocruz, from early March found that of eight Brazilian states studied, Covid-19 variants including P.1 were prevalent in at least 50% of new cases.

The variant is widely agreed to be more easily transmissible, up to 2.2 times so according to a recent study. That is more transmissible than the widely discussed B.1.1.7 variant first identified in the United Kingdom, which is up to 1.7 times more transmissible, according to a December study.That same study also found that people are 25% to 65% more likely to evade existing protective immunity from previous non-P.1 infections.

Finally, there remain concerns the different vaccines might not be as effective against the P.1 variant. Though a recent study from the UK did find that the "existing vaccines may protect against the Brazilian coronavirus variant," CNN spoke to several epidemiologists who remain concerned.

Amidst Brazil's unmitigated viral spread lies two additional, distinct threats. One, the easier export of the existing P.1 variant abroad. It's already in at least two dozen countries and counting and international travel to and from Brazil is still open to for most countries.Two, if the P.1 variant was created here, so can others.

Under the laws of viral evolution, new variants are created to try and allow the virus to spread more easily. Along the way, more dangerous iterations can be created.

With a lack of a vaccines and a government unwilling to take the steps necessary to prevent that from happening, it is unclear how things get better in Brazil anytime soon.

Second, the science shows that the older a tree gets, the more carbon it can absorb and store. It's like slowly turning up the speed on a vacuum cleaner. That means that we need to not only protect the old forests but also allow the young forests to grow old. It also means that protecting forests that are already established is one of the most effective strategies when it comes to climate change.

Third, we all support the re-establishment of forests on lands where there are none currently, but that is a long-term strategy and we need short-term solutions that address the current climate emergency. We only have about eight years to turn things around, according to the Intergovernmental Panel on Climate Change. It is much more effective to protect a natural forest that already exists than to plant a new one. It takes decades, if not up to a century for a forest ecosystem to evolve and time is not on our side when it comes to avoiding climate chaos.

Finally, there is deforestation. What Brazil does with its rainforest and what we do with our urban sprawl and what China does with its rapid urbanization into wilderness areas is everybody’s business. All three countries are removing natural buffers and expanding the interface, the touch points, between wildlife and people where pandemics emerge. That has to stop.

The global rate of consumption growth, before the pandemic, was 3% a year. Population growth is 1%. Some people assume this means that the rise in population bears one-third of the responsibility for increased consumption

But population growth is overwhelmingly concentrated among the world’s poorest people, who have scarcely any A or T to multiply their P. The extra resource use and greenhouse gas emissions caused by a rising human population are a tiny fraction of the impact of consumption growth.

Yet it is widely used as a blanket explanation of environmental breakdown.

Panic about population growth enables the people most responsible for the impacts of rising consumption (the affluent) to blame those who are least responsible.

At this year’s World Economic Forum in Davos, the primatologist Dame Jane Goodall, who is a patron of the charity Population Matters, told the assembled pollutocrats, some of whom have ecological footprints thousands of times greater than the global average: “All these things we talk about wouldn’t be a problem if there was the size of population that there was 500 years ago.”

If we had the global population of 500 years ago (around 500 million), and if it were composed of average UK plane passengers, our environmental impact would probably be greater than that of the 7.8 billion alive today.

he proposed no mechanism by which her dream might come true. This could be the attraction. The very impotence of her call is reassuring to those who don’t want change. If the answer to environmental crisis is to wish other people away, we might as well give up and carry on consuming.

Since the clergymen Joseph Townsend and Thomas Malthus wrote their tracts in the 18th century, poverty and hunger have been blamed not on starvation wages, war, misrule and wealth extraction by the rich, but on the reproduction rates of the poor.

Winston Churchill blamed the Bengal famine of 1943, that he helped to cause through the mass export of India’s rice, on the Indians “breeding like rabbits”. In 2013 Sir David Attenborough, also a patron of Population Matters, wrongly blamed famines in Ethiopia on “too many people for too little land”, and suggested that sending food aid was counter-productive.

Malthusianism slides easily into racism.

Most of the world’s population growth is happening in the poorest countries, where most people are black or brown. The colonial powers justified their atrocities by fomenting a moral panic about “barbaric”, “degenerate” people “outbreeding” the “superior races”

These claims have been revived today by the far right, who promote conspiracy theories about “white replacement” and “white genocide”. When affluent white people wrongly transfer the blame for their environmental impacts on to the birthrate of much poorer brown and black people, their finger-pointing reinforces these narratives. It is inherently racist.

The far right now uses the population argument to contest immigration into the US and the UK

how do we distinguish proportionate concerns about these harms from deflection and racism? Well, we know that the strongest determinant of falling birth rates is female emancipation and education. The major obstacle to female empowerment is extreme poverty. Its effect is felt disproportionately by women.

So a good way of deciding whether someone’s population concerns are genuine is to look at their record of campaigning against structural poverty.

Have they contested the impossible debts poor nations are required to pay? Have they argued against corporate tax avoidance, or extractive industries that drain wealth from poorer countries, leaving almost nothing behind

Or have they simply sat and watched as people remain locked in poverty, then complained about their fertility?

Before long, this reproductive panic will disappear. Nations will soon be fighting over immigrants: not to exclude them, but to attract them, as the demographic transition leaves their ageing populations with a shrinking tax base and a dearth of key workers.

This isn’t an American crisis alone. All around the world, developed nations have locked themselves into unsustainable, energy-intensive lifestyles.

Among those with the largest footprints are wealthy oil-producing microstates with small populations, like Qatar or Trinidad and Tobago, where the per-capita footprint pushes 60 tons

In the next tier, with the United States, are other sprawling, continent-size countries that use a lot of heating or cooling and where people tend to drive long distances, such as Canada and Australia (around 20 tons)

By dint of their density and reliance on mass transit, nations in Western Europe (as well as Japan and South Korea) make up most of the next tier, which cleaves roughly into two groups: places like Germany, Norway and the Netherlands that rely more on fossil fuels (around 15 tons),

places like the United Kingdom, Denmark and France that use a higher percentage of nuclear and renewable power. Though it’s half the size of an American’s, the footprint of someone in the typical French household still remains unsustainably high: around nine tons.

This is the paradox at the heart of climate change: We’ve burned far too many fossil fuels to go on living as we have, but we’ve also never learned to live well without them

the problem of the future is how to create a 19th-century carbon footprint without backsliding into a 19th-century standard of living. N

The greatest crisis in human history may require imagining ways of living — not just of energy production but of daily habit — that we have never seen before. How do we begin to imagine such a household?

With a carbon footprint hovering around the global median of 4.5 tons per capita, it falls within a narrow tier of nearly developed countries within sight of two tons per capita — the estimated amount needed to limit the world to 1.5 degrees Celsius of warming.

There are countries more prosperous, and countries with a smaller carbon footprint, but perhaps in none do the overlapping possibilities of living well and living without ruin show as much promise as in Uruguay.

Mujica harbored another deeper belief too. For years, he had been arguing that the “blind obsession to achieve growth with consumption” was the real cause of the linked energy and ecological crises.

In speeches, he pushed his people to reject materialism and embrace Uruguay’s traditions of simplicity and humility. “The culture of the West is a lie,” he told me. “The engine is accumulation. But we can’t pretend that the whole world can embrace it. We would need two or three more planets.”

He shared his own experience in solitary confinement, and how years without books or conversation drew him closer to the fundamentals of being: nature, love, family. “I learned to give value to little things in life. I kept some frogs as pets in prison and bathed them with my drinking water,”

“The true revolution is a different culture: learning to live with less waste and more time to enjoy freedom.”

By 2016, an array of biomass, solar and some 50 wind parks had replaced the grid’s use of oil, helping slash more than half a billion dollars from the country’s annual budget. Today, Uruguay boasts one of the world’s greenest grids, powered by 98 percent renewable energy.

prevailing economic conditions and something in Uruguay’s character had afforded the transition more receptivity than anyone predicted. This was one way in which a career in theoretical physics prepared Méndez for the world of policymaking, he said: “You have to be open to the solutions being very narrow and technical, or very wide and human.”

as the energy sector shifted, the mind-set in the country began to shift with it, Méndez said, sometimes in surprising ways. Some bought air-conditioning units, but many kept to their formerly low-consumption habits, continuing to hang their laundry and take the bus, dozens of which in Montevideo were now electric. Others bought plug-in timers to automate their laundries to run at night or installed solar water heaters on their roof

for Méndez, the biggest shift was among leaders. In cabinet and business meetings the problems of the future — like how to eliminate industrial waste and phase out gas entirely — began to feel like just that, he said: problems, not crises.

there appeared to be fundamental tension in how to bring Uruguayans along in the energy transition. On the one hand, the infrastructure shift needed to happen in the background, so the public never lost confidence in the grid — that part had been surprisingly smooth. But on the other hand, it was important to keep people engaged so they would support the necessary changes to come

Emaldi and her colleagues focused their efforts on electrifying transportation and growing the green-energy sector. The government eliminated duties and taxes on electric cars and rebranded a tax on gas as a CO2 tax, with a portion funding green initiatives.

“What comes in the near future will change more lives,” Minister Paganini told me. “You have to get into sectors or areas that are much more difficult than just changing the generation of electricity.” You need to change human behavior.

fossil fuels gave humanity the ability to choose our food, to transform a rainforest or windblown desert into something fertile and constant, a biotic vending machine from which eaters can select whatever they want whenever they want it. This choice now drives about a third of all global emissions. Most of them stem from the growing process itself — clearing land, fertilizing crops — with the bulk of the rest coming indirectly from the vast web of manufacturing and delivery systems that bring it to us: packaging crackers, refrigerating drumsticks, airlifting avocados.

One reason the global cattle industry had become so damaging, Baethgen said, was that too many grasslands had been razed or degraded. In the short term, feedlots produced more food, often with lower emissions, since cows got fatter faster and burped less frequently, but over the long term, without the grasslands to recycle carbon, net emissions built up. From Baethgen’s perspective, every damaged field thus represented a huge opportunity: By restoring grasslands, he could not only pull more greenhouse gases into the ground, but also grow more beef. And since the 1990s, Uruguay has managed a remarkable feat: increasing its annual production of beef without any increase in greenhouse gases — and doing all of this on natural pasturelands.

He believed too much climate science relied on big-picture modeling to drive engagement. “Those science-fiction scenarios were great to increase awareness,” he said. “But if you give a minister of agriculture information for the year 2080, that doesn’t do anything.” He waved a hand over the landscape. “You’re providing information, far in the future, with no resolution and no certainty. That’s the best combination to ensure paralysis. Nobody does anything.”

In his 2016 book, “The Great Derangement,” the Indian writer Amitav Ghosh says it’s unwise to reduce climate denial to “only a function of money and manipulation.” The sheer level of paralysis, he writes, “suggests that the climate crisis threatens to unravel something deeper, without which large numbers of the people would be at a loss to find meaning.” Ghosh wonders if the modern consumer mind-set can ever change, collectively or otherwise: “In a world where the rewards of a carbon-intensive economy are regarded as wealth, this must be reckoned as a very significant material sacrifice.”

Esponda described his family as middle to upper middle class. Both he and Laroca were economists for the city and together made about $30,000 a year. “Everybody in Uruguay is middle class,” he said. I thought I knew what he meant. Unlike in the United States, I found it difficult in Uruguay to discern class differences. Conspicuous displays of wealth seemed rare, as were the tiers of consumer goods that otherwise revealed someone’s spending. “There’s not the American consumerist mentality of ‘We need to get the next new thing,’”

On trips to New Orleans and Chicago, he had been transfixed by the selection of junk food in convenience stores, the undamaged furniture left on the street. “You guys throw away your whole home,” he told me. “Here, most of this stuff wouldn’t be trash.”

Esponda pointed to his couch, a sagging green camelback. It was given to them by his parents, he said, and barely fit his growing family anymore. But he couldn’t find a reason to replace it, even with a dual income that allowed them to save each month. “Why would I?” he said. It was a mentality apparent throughout the couple’s apartment. In stark contrast to most American homes with two kids, their apartment wasn’t overflowing with toys. Two bikes leaned against the wall by a plastic slide. “Our choices don’t really have anything to do with the environment,” he said. “It’s about saving money, yes, but also being careful with what we buy.”

Several people described frugality to me as a core tenet of the Uruguayan political project, though globalization had played a role, too.

something a man in the asentamientos said to me: “Nobody has confronted the real problem: How will the country grow?”

I thought of a single dad I met in Montevideo who said I shouldn’t think of his country as a model or example. It was too small, its progress too troubled. It was more like a laboratory for the rest of the world, he said.

We often picture the future as a kind of growth, a set of possibilities to expand and realize, but maybe it could also be the opposite, a present to reconcile and safeguard.

Part of the reason America has become so paralyzed by climate change is precisely that we’ve failed to acknowledge the limits it imposes — on where we can live, the things we can have, the household we can envision. This is a particularly difficult idea to sell to a country perched atop decades of accrued wealth, which was itself amassed by generations imagining further comfort and choice.

In the coming months, gas prices spiked, inflation climbed and the price of energy began to strangle Europe. No future seemed as certain as a less abundant one.

A former bank analyst at Bear Stearns, Estrada had decided to take a 75 percent pay cut to return home and eventually took a job with a local energy firm. “I read studies about how there’s a diminishing return on happiness above a certain income, and I experienced that,” he told me of living in New York. “I had more money than I had things I wanted to buy.” He said that contracting his life had allowed him to be more mindful of its details. It reminded him of the household his parents ran in the 1980s, when things were so precarious. No one left lights on or wasted water. They were mindful of the things they bought.

“We learn to live with less here,” he said. “And it’s made my life better.”

The federal government encouraged this practice from the start. The Timber Culture Act passed in 1873, permitted homesteaders to claim an additional 160 acres of free land by planting trees on at least a quarter of it. Decades later, desperate to curb the Dust Bowl, President Franklin Roosevelt channeled roughly $14 million — mostly via emergency relief and the Works Progress Administration — to the Prairie States Forestry Project, resulting in nearly 19,000 miles of windbreaks throughout the Great Plains, many of them composed of Eastern redcedar.

Still today, the Department of Agriculture subsidizes the planting of redcedar for everything from windbreaks to wildlife habitat. State programs provide similar cost-share programs, and it’s from all of these plantings (and more) the spread — or the “encroachment,” as ecologists call it — generally begins.

In 2018, the rangeland ecologist Dirac Twidwell and his colleagues at the University of Nebraska began the Eastern Redcedar Science Literacy Project to catalog the fallout

Eastern redcedar can transform a thriving tallgrass prairie into a closed canopy woodland in just 40 years. In the process, critical biodiversity is evicted from the landscape. The majority of grassland bird species are no longer present where Eastern redcedar cover exceeds just 10 percent of land cover. Beyond 30 percent, most small mammals vanish, too. And as too many ranchers and other land managers can now attest, both forage production and plant diversity take a nosedive in the Green Glacier’s wake.

Allergies. Wildfires. Tick-borne disease. All of these problems climb while stream flow and groundwater recharge rates often decline. True, a juniper woodland sequesters more carbon. But the grassland it muscled out was a more reliable carbon sink, storing more than 90 percent of its capture underground, safe from wildfires that would send that carbon into the atmosphere. From virtually every angle — environmental or economic, livestock or literature, air quality or landscape aesthetics — the Green Glacier is a problem.

“The Great Plains biome is dying,” Dr. Twidwell said. “Losing grasslands at this scale is akin to losing tropical rainforests or coral reefs.”

for decades now, discussion about the Green Glacier has been largely relegated to the dusty confines of trade journals and agricultural conventions. Perhaps this is because the vast majority of our remaining grasslands are privately owned. Perhaps, as our forests burn and our levees break, there is little sympathy left for the livestock industry, responsible for roughly 15 percent of the world’s greenhouse gas emissions — never mind the many effects of tree encroachment that bleed far beyond the ranch.

If America wants to preserve what’s left of Cather’s spiritual homeland, something greater than what Dr. Twidwell calls “postage-stamp prairies,” then “the clock is ticking,”

The good news is that prescribed fire, where done repeatedly, has proved to effectively halt the Green Glacier’s spread. In fact, the Loess Canyons Rangeland Alliance, a group of neighboring landowners in southwestern Nebraska, is one of the first documented groups to halt the encroachment on a regional scale.

Bonobos became famous for showing that nature didn’t always have to be red in tooth and claw. “Bonobos are an icon for peace and love, the world’s ‘hippie chimps,’” Sally Coxe, a conservationist, said in 2006.

Because bonobos live in remote, swampy rainforests, it has been much more difficult to observe them in the wild than chimpanzees. More recent research has shown that bonobos live a more aggressive life than their reputation would suggest.

In a study based on thousands of hours of observations in the wild published on Friday, for example, researchers found that male bonobos commit acts of aggression nearly three times as often as male chimpanzees do.

“There is no ‘hippie ape,’”

As our closest living relatives, bonobos and chimpanzees can offer us clues about the roots of human behavior. We and the two species share a common ancestor that lived about 7 million years ago. About 5 million years later, bonobos split off from chimpanzees.

In 2012, a trio of Harvard researchers proposed that bonobos evolved much like dogs did. Less aggressive wolves were not as likely to be killed by humans, which over time led to the emergence of dogs. In a similar fashion, the researchers argued, female bonobos preferred to mate with less aggressive males, giving birth to less aggressive offspring.

The researchers called their idea the self-domestication hypothesis. In later years, they speculated that humans may have undergone a self-domestication of their own.

Dr. Mouginot soon became perplexed, as she saw that male bonobos acted aggressively on a regular basis. Unlike male chimpanzees, who started their days in a mellow mood, the male bonobos seemed to wake up ready for a fight.

She and her colleagues trained field assistants, who made more observations throughout the pandemic. The new analysis, based on 9,300 hours of observations on 12 male bonobos and 14 male chimpanzees, found that bonobos committed aggressive acts 2.8 times as frequently as than the chimpanzees did.

Dr. Mouginot found that the frequent bonobo aggressions almost always involved a single male attacking another male. Chimpanzees, in contrast, often ganged up to attack a victim.

the study set a new standard for comparing aggression in bonobos and chimpanzees.

Dr. Mouginot speculated that male chimpanzees engage in one-on-one aggression less often because it poses bigger dangers: A victim of aggression may not want to go on a border patrol with the perpetrator, for example. Or he may bring back some of his own allies to wreak vengeance.

It may be easier for male bonobos to get away with aggression, Dr. Mouginot said, because in their female-dominated society they don’t face the risks that come with male alliances. “I think that’s why we see more aggression in bonobos — because it’s less risky to act aggressively against other males,”

the apes that carried out the most aggressive acts were also the ones who mated most often.

parts of the self-domestication hypothesis “clearly need refinement.” It may be important to consider the effect that different kinds of aggression have on a species, rather than lumping them altogether, he said.

Still, he argued that the differences between the two species remained significant. “Chimpanzees murder, and bonobos don’t,