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officials urged residents of coastal areas in much of the West Coast, Alaska and Hawaii to stay away from the coastline and move to higher ground. The National Weather Service in Portland, Ore., reported possible one- to three-foot waves in some areas of Oregon and Washington.

In California, water surged into Santa Cruz Harbor on Saturday morning, damaging boats, submerging the parking lot and causing people to evacuate the docks, sidewalks and nearby stores

In the Bay Area, the National Weather Service said tsunami surges of up to a few feet could arrive in “pulses” throughout the day, and warned residents not to try to identify their arrival.

Jaclyn Rothenberg, a spokeswoman for the Federal Emergency Management Agency, said the agency did not expect damages from the tsunami, and stressed the importance of disaster preparedness.

She added that the agency had coordinated with its partners in American Samoa and Hawaii, which had “no impacts from this event.”

Across the Pacific warnings were sounded. New Zealand’s National Emergency Management Agency advised people in coastal areas to expect “strong and unusual currents and unpredictable surges at the shore.” And on their Facebook pages, the meteorological services for Fiji and Samoa also issued alerts, advising people to stay away from low-lying coastal areas.

The volcano, Hunga Tonga-Hunga Ha’apai, which is about 40 miles north of Tongatapu, had been relatively inactive for several years. It began erupting intermittently in December but by Jan. 3 the activity had decreased significantly, according to a report by the Smithsonian Institution’s Global Volcanism Program.

Satellite imagery of the eruption on Saturday, shared on Twitter by New Zealand’s National Institute of Water and Atmospheric Research, showed a “brief spike in air pressure as the atmospheric shock wave pulsed across New Zealand.”

The V.E.I. of the eruption Saturday has not been estimated yet, but before the eruption, the volcano was estimated to be able to produce an eruption with a maximum V.E.I. of 2.

It's thought that all or part of Zealandia may have existed as an island for a while. But then around 25 million years ago, it was disappeared beneath the ocean

The first real clues that New Zealand might represent just a tiny, visible portion of a vast incognito landmass came in 2002, when scientists used bathymetry – the study of the depth of bodies of water – to analyse the region. The ocean above what we now call Zealandia is considerably shallower than that surrounding it, suggesting that the area was not underlain by an oceanic tectonic plate – like most of the world's oceans – but a continental one.

The clincher came in 2017, when scientists put several lines of evidence together, including data about the kinds of rocks it contains and its relative thickness – oceanic plates tend to be thinner – to propose that this is indeed a new continent. This is not a mere continental fragment or microcontinent, as had previously been proposed, but the real deal, 95% of which is submerged underwater.

despite the excitement around the discovery of a new continent, and more than a decade of intensive research, many details of Zealandia's early formation have remained elusive. This is partly because of a strange event that occurred when it split from Gondwana.

In 2019, an international team of scientists mapped the geology of South Zealandia. Their research revealed that at some point, Zealandia had been stretched – pulled apart by tectonic forces, thinning the continent compared to regular continental plates and creating ruptures that later became oceanic crust. In the process, it became twisted and this made reconstructing its history to work out its original form much more challenging. 

The researchers' analysis of rocks from the lost continent revealed that the stretching happened in two stages. The first began around 89-101 million years ago, and led to a rip which became the Tasman Sea inbetween Australia and New Zealand. The second phase started 80-90 million years ago and led to Zealandia splitting off from West Antarctica and creating the Pacific Ocea

For the latest study, another research group – involving many of the same geologists as before – charted North Zealandia. This time, they analysed rocks that had been dredged up from the Fairway Ridge, a region of the South Pacific off the coast of Australia, which forms the northernmost tip of Zealandia. These ancient remnants, which have not had a dry day for 25 million years, included a mixture of igneous rocks – those formed by volcanic processes – and sedimentary ones made in shallow basins just off the coast of Zealandia.

The resulting maps of Zealandia transform it from a featureless mass into a place with many bands of distinctive geology running along its length from northwest to southeast. These fit together with the geology of West Antarctica like a jigsaw puzzle, confirming that this region and Zealandia once slotted together.

“All the other ships – even the cargo ships – knew to wait for the storm to pass,” said Liu Gang, a 38-year-old from Jiangsu province whose mother was on the boat. “Why didn’t this one stop?”

“Don’t we have human rights? Why won’t you let us see the bodies?” she screamed. “You have found the bodies so why won’t you let us see them? Don’t we have any human rights in China? It’s my own mother. Why can’t I see her?”

This debate doesn't have much to do with the merits of torture as an intelligence-gathering mechanism: The evidence that torture doesn't work is overwhelming. Rather, the debate among four leading Republicans over the practice is all about politics, both inside the Republican Party and more broadly.

Cruz, for example, has said that waterboarding does not constitute torture, but also that he would not "bring it back in any sort of widespread use" and has co-sponsored legislation limiting its use.

Well, under the definition of torture, no, it's not. Under the law, torture is excruciating pain that is equivalent to losing organs and systems, so under the definition of torture, it is not. It is enhanced interrogation, it is vigorous interrogation, but it does not meet the generally recognized definition of torture.

international law, under both the UN Convention Against Torture and the Geneva Conventions, considers waterboarding a form of torture and thus illegal.

A January 2005 Gallup poll found that 82 percent of Americans believed "strapping prisoners on boards and forcing their heads underwater until they think they are drowning" was an immoral interrogation tactic.

In 2007, 40 percent of Americans favored waterboarding suspected terrorists in a CNN poll, while 58 percent opposed. By 2014, 49 percent told CBS that they believed waterboarding could be at least sometimes justified, while only 36 percent said it never could be.

Today, 73 percent of Republicans support torturing suspected terrorists, according to Pew.

Any Republican who took a strong stance against waterboarding or other torture techniques could be pegged as weak on terrorism — a damning charge in a Republican primary that's been preoccupied with ISIS.

Reminder: Torture is morally abhorrent and also doesn't work

Some proponents will claim that while morally regrettable, torture is nonetheless necessary to keep us safe. But the best evidence suggests that it this is a false choice: Waterboarding, and other forms of torture, does not work.

In most cases, torture is used by authoritarian states to force false confessions

The evidence that torture did not aid the hunt for Osama bin Laden is particularly compelling.

In other words, some GOP candidates' pro-torture sentiment isn't just a relic of Bush-era partisan debates — it's also totally out of whack with everything we know about the practice of torture today.

“The level of activity,” a senior European diplomat said, “is comparable to what we saw in the Cold War.

“The risk here is that any country could cause damage to the system and do it in a way that is completely covert, without having a warship with a cable-cutting equipment right in the area,” said Michael Sechrist, a former project manager for a Harvard-M.I.T. research project funded in part by the Defense Department.

Attention to underwater cables is not new. In October 1971, the American submarine Halibut entered the Sea of Okhotsk north of Japan, found a telecommunications cable used by Soviet nuclear forces, and succeeded in tapping its secrets.

Submarines are not the only vessels that are snooping on the undersea cables. American officials closely monitor the Yantar, which Russian officials insist is an oceanographic ship with no ties to espionage.

Russian Arctic bases and their $2.4 billion investment in the Black Sea Fleet expansion by 2020 demonstrate their commitment to develop their military infrastructure on the flanks, he said.

“The coral! The coral!” I mouth underwater, snorkeling at a reef, splashing my gestures. I do not say: “Look carefully. Look. Remember it. It will soon be only in your memory.”

We live in an age of ephemerality, and the devastation of a building that had survived the Middle Ages, the French Revolution and the Second World War comes barely as a surprise. We expect such events now. Our children expect them.

Once-stable institutions, impregnable towers, burn and topple everywhere.

The art we cherish is the art of addictive consumability rather than a celebration of the eternal.

And our time will leave no Notre Dame as a memento for the future. The present’s contribution to posterity will be the 620,000 square miles of disposable floating plastic trapped in the North Pacific Gyre, with a half-life of between 450 and 800 years

In such conditions, the desire to see the world can only ever be the desire to see the world falling apart.

How fast that will happen is hard to say. But a place like Miami is going to go underwater. There is no stopping that. There’s only trying to think about how we reinvent Miami to live with water.

But you can’t do anything like that in Miami or South Florida. There’s no real technological fix for rising seas there other than elevating structures or retreating.

In Florida, you also have a geology of porous limestone that makes it difficult to build sea walls around places like Miami and Miami Beach because the water will just come through underneath and flood from below. In the Netherlands they’ve built the dikes to keep the water out. In New Orleans, which was flooded severely during Hurricane Katrina, they have also built big dikes.

Much of your book focuses on Florida. Why is that state at such risk from sea-level rise? The vast majority of south Florida is less than six feet above high tide. That risk is exacerbated by the fact that it’s on a hurricane track, so you get these storm pulses that come through every year.

we’ve been hearing the same “woe is you” sentiment for a long time. It’s as if people think the mere acknowledgment is the work. But as North Minneapolis prepares to brace ourselves for the grim future Detroit and Milwaukee have shown us, the death tolls suggest that acknowledgments don’t mean a thing. I want to take us back to this notion of remedy.

We’re now learning that underlying conditions like asthma can be a death sentence for people of any age if they come down with Covid-19. Staring down the barrel of this threat, it feels like we’re too late. The real fight isn’t won by defeating Northern Metals. The real fight is won when the air is clean — an ask that is always made to feel far-fetched.

Discrimination shouldn’t just end; the inequity it causes should be remedied.

In “The Case for Reparations,” Ta-Nehisi Coates chronicled the carefully designed circumstances that have placed black people, by and large, in a position of low wealth in America. It’s not a force of nature, it’s not even a puzzle — the how we got here is known and the path out is knowable.

We should have found a way to pay out reparations long ago. Now this pandemic is bringing forward the full horror of our inability to reckon with America’s history of racial terror. For many black people experiencing the disproportionate impact of this crisis, any solution will come too late; the consequences of our inaction are too final.

I thought about the disproportionate number of black folks dying from the coronavirus because they had asthma, diabetes or hypertension. Because they had limited access to affordable, healthy food. Because they lived near factories. Because they couldn’t afford to visit a doctor or because they couldn’t afford to miss work. Because their blood pressure was perpetually too high from a lifetime of being stressed out by all of the above.

I thought about how predictable this all was. How preventable.

• Testing. The CDC develops tests for its own internal use. The Food and Drug Administration requires that tests offered to the public be proved safe and effective. Government might have said “have at it, boys” and allowed anyone to make and sell anything and call it a Covid-19 test. This wouldn’t have been government.

• Testing, again. A MacGuffin that many countries, including the U.S., are converging on is constant and widespread testing to quarantine new cases. Testing will allow us to “flatten the curve” while lifting the stay-at-home orders and permit commerce to revive.

• The lockdowns. Imagine a problem that can be solved by holding your head underwater but stops being solved when you lift your head out. This is no solution. How can any society lift its stay-at-home order if there’s no vaccine and most people remain uninfected? Not even the Chinese, as we are about to learn, really have an answer

By now even the most tunnel-visioned epidemiologist must admit the lockdown cure will soon be worse than the disease, imposing social destruction beyond imagining.

Though the Trump administration is guilty of testing stumbles, unrealistic is the notion that enough testing could have been made available to contain a novel flu-like virus once it was widely established.

This probably is a polite fiction but it will let us get the economy mostly open. In reality, we will end up throwing a variety of strategies at a persistent epidemic (testing, treatments, voluntary social distancing) and accept what nature gives us.

And government will keep pouring resources into health care so we can at least believe every victim is getting a fair shot at survival.

• The death rate. Given asymptomatic cases and many mild cases that are indistinguishable from the cold or flu, experts have long suspected Covid-19 is more widespread than we know. At the same time, the fatality rate is affected by both undercounts and overcounts

The most up-to-date estimate by the Oxford Center for Evidence-Based Medicine suspects the death rate is a flu-like 0.1% to 0.39%.

• Herd immunity. Levels of honesty vary, but a fair approximation is that most countries expect the initial epidemic to burn itself out before a vaccine is available

• Value proposition. Getting back to the death rate, the average risk for each of us may be small but when an entire population is subjected to the same newly emergent small risk at the same time, it can overwhelm emergency rooms

The panicked governmental responses and clampdowns we’ve seen are best understood in this vein: A very low risk of death for a very large number of people has created a global crisis.

Not helping is the reality described in detail by the world’s newspapers: Recovery of the most severely affected patients on ventilators is rare and involves a great deal of personal suffering.

The search team used an underwater drone floating 40m (131ft) above the sea bed to scour the area. The wreck was found in more than 300m of water.

The Earth itself is our greatest ally in this effort. Ecosystems like California’s kelp forests absorb about half of the greenhouse gases humans emit, studies show. Without them, warming would be even worse. Nature shields us from the worst consequences of our own actions, forgiving the sins we refuse to repent.

If we hope to solve climate change, humanity must also address this biodiversity crisis — restoring ecosystems and the creatures that inhabit them.

One way to revitalize ecosystems: protect the ground they grow from.Think of the soft, spongy soil of an old-growth woodland. Here, a towering oak tree draws up water and nutrients via threadlike fungi attached to its roots. In exchange, the fungi take sugar from the oak, funneling carbon from the air into the ground.Now imagine a leaf from that oak drifting slowly to the forest floor. Perhaps it becomes food for an earthworm. Then microbes attack the earthworm’s droppings, breaking down the residue further still.Eventually, the carbon that was once a leaf can become trapped in clods of earth. Other atoms may form strong chemical bonds with minerals like iron, which prevents them from reacting with oxygen and returning to the air. Under the right conditions, carbon might stay locked away in dense, dark earth for centuries. Soils contain more carbon than the entire atmosphere and all the world’s plants combined.

This makes soil both a ticking time bomb and an overlooked climate solution

“And because soil is such an important reservoir,” Berhe said, “a small change in the release of that carbon can lead to a big change in the concentrations of greenhouse gases in the atmosphere.”

A 2020 analysis in the journal Nature Sustainability found that better soil stewardship could reduce emissions by at least 5.5 gigatons of carbon dioxide each year — about 15 percent of current annual emissions.

“Once that happens,” Berhe said, “it’s not just the carbon status of the soil that’s improved. The soil literally becomes softer. It holds more water and nutrients. It’s easier for plants to grow in … and serve as a home for the most abundant and diverse group of organisms that we know of.

Enhancing carbon in soils is just the beginning. In 2017, an international team of scientists set out to determine how much carbon the planet could pull out of the atmosphere, if humans would only give it a chance. In a study in the Proceedings of the National Academy of Sciences (PNAS), they concluded natural climate systems are capable of storing almost 24 gigatons of carbon dioxide per year — roughly two thirds of what people emit.

About half of that sequestration would be cost-effective, meaning enacting the necessary protections would cost less than the consequences of keeping that carbon in the air.

Of the climate solutions they studied, few delivered more carbon bang per buck than mangroves — lush systems of salt-tolerant shrubs and trees that thrive where freshwater rivers spill into the sea. Though these forests occupy just 0.5 percent of the Earth’s shorelines, they account for 10 percent of the coast’s carbon storage capacity.

But the unique ecosystems are too often dismissed as unproductive swamps, good for no one but the mosquitoes. In the past half-century, more than a quarter of the world’s mangroves have been destroyed — drained for development, converted for shrimp farms, poisoned by fertilizer and drowned by dammed-up streams.

Yet the Earth cannot compensate for all of humanity’s pollution, said William Schlesinger, former dean of Duke University’s School of the Environment and a co-author on the 2017 PNAS study. Unless people also reduce the amount of greenhouse gases we emit, no amount of ecological restoration will save us.

“The bottom line is we’ve got to get off of using fossil fuels in transportation and heating and lighting and everything else,”

In public talks, he puts it this way: “It’s easier to patch a hole in a bag than to pick up the marbles that fall out.”

Since the end of the last ice age, the frozen expanse at the top of the world has acted as a protective shield. During the summer, when the sun shines 24 hours a day, Arctic sea ice reflects about two-thirds of the light that hits it back into space. By contrast, the dark open ocean absorbs the majority of the sun’s heat.

If the Arctic loses its perpetual ice cover, it would add half a degree Celsius of warming to the global average temperature, studies suggest. The world is hurtling toward that milestone. Since 1979, the volume of ice left at the end of the summer has shrunk about 75 percent.

There is just one way to save it, she said: by stopping global warming. Only by ending the use of fossil fuels and eliminating greenhouse gas emissions can people prevent the Arctic from heating further and give the ice a chance to recover.

If we do nothing, models indicate, it will be a matter of decades before the summertime Arctic is ice-free for the first time in human history. Sea levels will surge, coastal communities will be deluged, and we will no longer have the planet’s air conditioning unit to help us cool our world down.

Our species evolved and our civilization was built under fairly stable climate conditions. When things changed, they changed slowly, giving us time to adapt.

The rapid transformation of our planet doesn’t just endanger ecosystems; humanity will suffer. People have never lived on a planet without mangroves, or peatlands, or summertime ice. We’ve never had to go without the benefits the Earth provides.

For its study, the corps focused on storm surge — the rising seas that often inundate the coastline during storms — made worse lately by stronger hurricanes and higher sea levels. But that is only one concern.

South Florida, flat and low-lying, sits on porous limestone, which allows the ocean to swell up through the ground. Even when there is no storm, rising seas contribute to more significant tidal flooding, where streets fill with water even on sunny days.

“What you realize is each of these problems, which are totally intersecting, are handled by different parts of the government,” said Amy C. Clement, a professor of atmospheric science at the University of Miami and the chairwoman of the city of Miami’s climate resilience committee.

The state could help, to a point. Republican lawmakers, who have controlled the Florida Legislature for more than 20 years, acknowledged in late 2019 that they had ignored climate change for so long that the state had “lost a decade.”

The price tag for all that needs to be done, however, is in the billions. The estimate for Miami-Dade County alone to phase out some 120,000 septic tanks is about $4 billion, and that does not include the thousands of dollars that each homeowner would also have to pay.

“We were, like, ruh-roh,” said Ken Russell, the Miami city commissioner whose district includes Brickell. “The $40 billion in assets you’re trying to protect will be diminished if you build a wall around downtown because you’re going to affect market values and quality of life.”

To some critics, the plan harks back to more than a century of dredging and pumping of the Florida Everglades, which made way for intensive farming and sprawling development but disregarded the serious damage to the environment that the state is still wrestling with.

In fact, when local governments have asked the public how they would like to tackle climate change, residents by far prefer what is known as green infrastructure: layered coastal protection from a mix of dunes, sea grasses, coral reefs and mangroves, said Zelalem Adefris, vice president for policy and advocacy at Catalyst Miami, which works with low-income communities in the county.

On a recent afternoon along the stretch of Brickell Bay Drive where a wall might go, Rachel Silverstein, executive director of Miami Waterkeeper, an environmental research and activist group, stood next to high-rises built right up to the water

“Instead of seeing this beautiful water, you would see a gross wall,” she said.

A new analysis of the shells revealed that 24% of them had smooth, shiny exteriors. They were also larger than the other shells. Both are indicators of fresh shells found on the seafloor, still attached to live clams.

This aligns with evidence from a recent study suggesting that some Neanderthals suffered from "surfer's ear," based on bony growths found on the ears belonging to a few Neanderthal skeletons. And previous research has pointed to the fact that neanderthals engaged in fishing.

"People are beginning to understand that Neanderthals didn't just hunt large mammals," Villa said. "They also did things like freshwater fishing and even skin diving."

The imagery showed how the area of the iceberg changed over time. The researchers also determined its thickness using data from satellites that measure ice height. By the time it broke up, Ms. Braakmann-Folgmann said, A68a was more than 200 feet thinner overall.

When the iceberg was near South Georgia, scientists with the survey were able to deploy autonomous underwater gliders to take water samples. On the island, they used tracking devices on some gentoo penguins and fur seals, to see whether the presence of the iceberg affected their foraging behavior.

A large influx of fresh water on the surface could affect the growth of phytoplankton, at the lower end of the food change, or it could alter the mix of phytoplankton species available, he said.

I had other doubts, too. It seemed hubristic, or worse, to make multitrillion-dollar policy bets based on computer models trying to forecast climate patterns decades into the future. Climate activists kept promoting policies based on technologies that were either far from mature (solar energy) or sometimes actively harmful (biofuels).

Expensive efforts to curb greenhouse gas emissions in Europe and North America seemed particularly fruitless when China, India and other developing countries weren’t about to curb their own appetite for fossil fuels

just how fast is Greenland’s ice melting right now? Is this an emergency for our time, or is it a problem for the future?

His pitch was simple: The coastline we have taken for granted for thousands of years of human history changed rapidly in the past on account of natural forces — and would soon be changing rapidly and disastrously by man-made ones. A trip to Greenland, which holds one-eighth of the world’s ice on land (most of the rest is in Antarctica) would show me just how drastic those changes have been. Would I join him?

Greenland is about the size of Alaska and California combined and, except at its coasts, is covered by ice that in places is nearly two miles thick. Even that’s only a fraction of the ice in Antarctica, which is more than six times as large

Greenland’s ice also poses a nearer-term risk because it is melting faster. If all its ice were to melt, global sea levels would rise by some 24 feet. That would be more than enough to inundate hundreds of coastal cities in scores of nations, from Jakarta and Bangkok to Copenhagen and Amsterdam to Miami and New Orleans.

There was also a millenarian fervor that bothered me about climate activism, with its apocalyptic imagery (the Statue of Liberty underwater) and threats of doom unless we were willing to live far more frugally.

“We haven’t had a good positive mass balance year since the late 1990s,” he told me in a follow-on email when I asked him to explain the data for me. The losses can vary sharply by year. The annualized average over the past 30 years, he added, is 170 gigatons per year. That’s the equivalent of about 5,400 tons of ice loss per second. That “suggests that Greenland ice loss has been tracking the I.P.P.C. worse-case, highest-carbon-emission scenario.

The data shows unmistakably that Greenland’s ice is not in balance. It is losing far more than it is gaining.

scientists have been drilling ice-core samples from Greenland for decades, giving them a very good idea of climatic changes stretching back thousands of years. Better yet, a pair of satellites that detect anomalies in Earth’s gravity fields have been taking measurements of the sheet regularly for nearly 20 years, giving scientists a much more precise idea of what is happening.

it’s hard to forecast with any precision what that means. “Anyone who says they know what the sea level is going to be in 2100 is giving you an educated guess,” said NASA’s Willis. “The fact is, we’re seeing these big ice sheets melt for the first time in history, and we don’t really know how fast they can go.”

His own educated guess: “By 2100, we are probably looking at more than a foot or two and hopefully less than seven or eight feet. But we are struggling to figure out just how fast the ice sheets can melt. So the upper end of range is still not well known.”

On the face of it, that sounds manageable. Even if sea levels rise by eight feet, won’t the world have nearly 80 years to come to grips with the problem, during which technologies that help us mitigate the effects of climate change while adapting to its consequences are likely to make dramatic advances?

Won’t the world — including countries that today are poor — become far richer and thus more capable of weathering the floods, surges and superstorms?

The average rate at which sea level is rising around the world, he estimates, has more than tripled over the past three decades, to five millimeters a year from 1.5 millimeters. That may still seem minute, yet as the world learned during the pandemic, exponential increases have a way of hitting hard.

“When something is on a straight line or a smooth curve, you can plot its trajectory,” Englander said. “But sea level, like earthquakes and mudslides, is something that happens irregularly and can change rather quickly and surprise us. The point is, you can no longer predict the future by the recent past.”

In The Wall Street Journal’s editorial pages, where I used to work, the theoretical physicist Steven Koonin, a former under secretary for science in the Obama administration’s Energy Department, cast doubt on the threat from Thwaites in a voice that could have once been mine. He also thinks the risks associated with Greenland’s melting are less a product of human-induced global warming than of natural cycles in North Atlantic currents and temperatures, which over time have a way of regressing to the mean.

Even the poorest countries, while still unacceptably vulnerable, are suffering far fewer human and economic losses to climate-related disasters.

Another climate nonalarmist is Roger Pielke Jr., a professor of environmental studies at the University of Colorado Boulder. I call Pielke a nonalarmist rather than a skeptic because he readily acknowledges that the challenges associated with climate change, including sea-level rise, are real, serious and probably unstoppable, at least for many decades.

“If we have to have a problem,” he told me when I reached him by phone, “we probably want one with a slow onset that we can see coming. It’s not like an asteroid coming from space.”

“Since the 1940s, the impact of floods as a proportion of U.S. gross domestic product has dropped by 70 percent-plus,” Pielke said. “We see this around the world, across phenomena. The story is that fewer people are dying and we are having less damage proportional to G.D.P.”

“Much climate reporting today highlights short-term changes when they fit the narrative of a broken climate but then ignores or plays down changes when they don’t, often dismissing them as ‘just weather,’” he wrote in February.

Global warming is real and getting worse, Pielke said, yet still it’s possible that humanity will be able to adapt to, and compensate for, its effects.

A few years ago, I would have found voices like Koonin’s and Pielke’s persuasive. Now I’m less sure. What intervened was a pandemic.

That’s what I thought until the spring of 2020, when, along with everyone else, I experienced how swiftly and implacably nature can overwhelm even the richest and most technologically advanced societies. It was a lesson in the sort of intellectual humility I recommended for others

It was also a lesson in thinking about risk, especially those in the category known as high-impact, low-probability events that seem to be hitting us with such regularity in this century: the attacks of Sept. 11, 2001; the tsunamis of 2004 and 2011, the mass upheavals in the Arab world

What if the past does nothing to predict the future? What if climate risks do not evolve gradually and relatively predictably but instead suddenly soar uncontrollably? How much lead time is required to deal with something like sea-level rise? How do we weigh the risks of underreacting to climate change against the risks of overreacting to it?

I called Seth Klarman, one of the world’s most successful hedge-fund managers, to think through questions of risk. While he’s not an expert on climate change, he has spent decades thinking deeply about every manner of risk

And we will almost certainly have to do it from sources other than Russia, China, the Democratic Republic of Congo and other places that pose unacceptable strategic, environmental or humanitarian risks

“If you face something that is potentially existential,” he explained, “existential for nations, even for life as we know it, even if you thought the risk is, say, 5 percent, you’d want to hedge against it.”

“One thing we try to do,” he said, “is we buy protection when it’s really inexpensive, even when we think we may well not need it.” The forces contributing to climate change, he noted, echoing Englander, “might be irreversible sooner than the damage from climate change has become fully apparent. You can’t say it’s far off and wait when, if you had acted sooner, you might have dealt with it better and at less cost. We have to act now.”

In other words, an ounce of prevention is worth a pound of cure. That’s particularly true if climate change is akin to cancer — manageable or curable in its earlier stages, disastrous in its later ones.

As I’ve always believed, knowing there is grave risk to future generations — and expecting current ones to make immediate sacrifices for it — defies most of what we know about human nature. So I began to think more deeply about that challenge, and others.

For the world to achieve the net-zero goal for carbon dioxide emissions by 2050, according to the International Energy Agency, we will have to mine, by 2040, six times the current amounts of critical minerals — nickel, cobalt, copper, lithium, manganese, graphite, chromium, rare earths and other minerals and elements — needed for electric vehicles, wind turbines and solar panels.

The poster child for this kind of magical thinking is Germany, which undertook a historic Energiewende — “energy revolution” — only to come up short. At the turn of the century, Germany got about 85 percent of its primary energy from fossil fuels. Now it gets about 78 percent, a puny reduction, considering that the country has spent massive sums on renewables to increase the share of electricity it generates from them.

As in everything else in life, so too with the environment: There is no such thing as a free lunch. Whether it’s nuclear, biofuels, natural gas, hydroelectric or, yes, wind and solar, there will always be serious environmental downsides to any form of energy when used on a massive scale. A single industrial-size wind turbine, for instance, typically requires about a ton of rare earth metals as well as three metric tons of copper, which is notoriously destructive and dirty to mine.

no “clean energy” solution will easily liberate us from our overwhelming and, for now, inescapable dependence on fossil fuels.

Nobody brings the point home better than Vaclav Smil, the Canadian polymath whose most recent book, “How the World Really Works,” should be required reading for policymakers and anyone else interested in a serious discussion about potential climate solutions.

“I’ve talked to so many experts and seen so much evidence,” he told me over Zoom, “I’m convinced the climate is changing, and addressing climate change has become a philanthropic priority of mine.”

Things could turn a corner once scientists finally figure out a technical solution to the energy storage problem. Or when governments and local actors get over their NIMBYism when it comes to permitting and building a large energy grid to move electricity from Germany’s windy north to its energy-hungry south. Or when thoughtful environmental activists finally come to grips with the necessity of nuclear energy

Till then, even as I’ve come to accept the danger we face, I think it’s worth extending the cancer metaphor a little further: Just as cancer treatments, when they work at all, can have terrible side effects, much the same can be said of climate treatments: The gap between an accurate diagnosis and effective treatment remains dismayingly wide

Only when countries like Vietnam and China turned to a different model, of largely bottom-up, market-driven development, did hundreds of millions of people get lifted out of destitution.

the most important transformation has come in agriculture, which uses about 70 percent of the world’s freshwater supply.

Farmers gradually adopted sprinkler and drip irrigation systems, rather than more wasteful flood irrigation, not to conserve water but because the technology provided higher crop yields and larger profit margins.

Water shortages “will spur a revolutionary, aggressive approach to getting rid of flood irrigation,” said Seth Siegel, the chief sustainability officer of the Israeli AgTech company N-Drip. “Most of this innovation will be driven by free-market capitalism, with important incentives from government and NGOs.

meaningful environmental progress has been made through market forces. In this century, America’s carbon dioxide emissions across fuel types have fallen to well below 5,000 million metric tons per year, from a peak of about 6,000 million in 2007, even as our inflation-adjusted G.D.P. has grown by over 50 percent and total population by about 17 percent.

1) Engagement with critics is vital. Insults and stridency are never good tools of persuasion, and trying to cow or censor climate skeptics into silence rarely works

the biggest single driver in emissions reductions from 2005 to 2017 was the switch from coal to natural gas for power generation, since gas produces roughly half the carbon dioxide as coal. This, in turn, was the result of a fracking revolution in the past decade, fiercely resisted by many environmental activists, that made the United States the world’s largest gas producer.

In the long run, we are likelier to make progress when we adopt partial solutions that work with the grain of human nature, not big ones that work against it

Renewables, particularly wind power, played a role. So did efficiency mandates.

The problem with our civilization isn’t overconfidence. It’s polarization, paralysis and a profound lack of trust in all institutions, including the scientific one

Devising effective climate policies begins with recognizing the reality of the social and political landscape in which all policy operates. Some thoughts on how we might do better:

They may not be directly related to climate change but can nonetheless have a positive impact on it. And they probably won’t come in the form of One Big Idea but in thousands of little ones whose cumulative impacts add up.

2) Separate facts from predictions and predictions from policy. Global warming is a fact. So is the human contribution to it. So are observed increases in temperature and sea levels. So are continued increases if we continue to do more of the same. But the rate of those increases is difficult to predict even with the most sophisticated computer modeling

3) Don’t allow climate to become a mainly left-of-center concern. One reason the topic of climate has become so anathema to many conservatives is that so many of the proposed solutions have the flavor, and often the price tag, of old-fashioned statism

4) Be honest about the nature of the challenge. Talk of an imminent climate catastrophe is probably misleading, at least in the way most people understand “imminent.”

A more accurate description of the challenge might be a “potentially imminent tipping point,” meaning the worst consequences of climate change can still be far off but our ability to reverse them is drawing near. Again, the metaphor of cancer — never safe to ignore and always better to deal with at Stage 2 than at Stage 4 — can be helpful.

5) Be humble about the nature of the solutions. The larger the political and financial investment in a “big fix” response to climate change on the scale of the Energiewende, the greater the loss in time, capital and (crucially) public trust when it doesn’t work as planned

6) Begin solving problems our great-grandchildren will face. Start with sea-level rise

We can also stop providing incentives for building in flood-prone areas by raising the price of federal flood insurance to reflect the increased risk more accurately.

7) Stop viewing economic growth as a problem. Industrialization may be the leading cause of climate change. But we cannot and will not reverse it through some form of deindustrialization, which would send the world into poverty and deprivation

8) Get serious about the environmental trade-offs that come with clean energy. You cannot support wind farms but hinder the transmission lines needed to bring their power to the markets where they are needed.

9) A problem for the future is, by its very nature, a moral one. A conservative movement that claims to care about what we owe the future has the twin responsibility of setting an example for its children and at the same time preparing for that future.

The rescue efforts also couldn’t be more different: a frantic rush to save five wealthy people versus a shoulder shrug at the idea of 100 children dead at the bottom of the sea.

The Greek coastguard and government officials, in response to criticism of their handling of the disaster, have said that people on board refused any help. Activists, on the other hand, have said the people on board were pleading for help more than 15 hours before it sank. In any case, is it really the job of a coast guard to look at a ship full of desperate people, full of innocent children, and decide they don’t want help

Nobody looked at the Titan and thought: ahh well, they signed a waiver saying they accepted death was a possibility, there’s no point saving them.

If you find yourself more captivated by the story of five rich people in a submersible rather than the 750 people who sank on a fishing trawler, it’s not because you’re a bad person. It’s because it’s human nature to be feel overwhelmed by suffering at scale; it’s called psychic numbing. As the saying goes, one death is a tragedy, a million deaths is a statistic.

They deserve the same sort of resources and attention and empathy that five rich adventurers, who put themselves in harm’s way for the fun of it, rather than because they were desperate for a better life, have had.

I hope it makes it uncomfortably clear that, in the eyes of the media and policymakers, one missing billionaire is seemingly more important than hundreds of missing migrants.

I hope it makes more people interrogate the ways in which migrants are blamed for their deaths, blamed for seeking out better lives – and how completely different that is from the empathy afforded to millionaires seeking out underwater thrills.

Many of New Zealand’s more traditionally minded scientists, however, see the spiritual and moral aspects of mātauranga as contradictory to conventional science, which is supposed to be value-neutral and limited to knowledge that can be empirically proven.

Kendall Clements, a marine biologist who signed the letter, said they were not trying to disrespect mātauranga, but to emphasize the differences between it and conventional science.

“In trying to probe that difference, we may collectively come to a better understanding of a solution than if we drew on a single body of knowledge in isolation,” he said.

Some alleged that the letter was an example of white supremacy. Waikaremoana Waitoki, the president of the New Zealand Psychological Society, denounced the letter’s “racist tropes” and “moral panic.”

The situation became more tense after the polarizing British biologist Richard Dawkins denounced the Royal Society’s investigation and described mātauranga as “not science and not true.”

For Te Arawa, the melding of mātauranga with conventional science has proved successful. Amid the weedy jungle in Lake Rotomā’s shallows, an enormous clearing has emerged.

“We’ve essentially created new mātauranga,” Mr. O’Neill said before carefully tucking his dreadlocks beneath the cap of his wet suit and slipping into the lake. “And we’re going to use it to finish the last of the lake weed off.”

how many are aware that President Biden is among the more popular — well, less unpopular — leaders in the Western world?

First, let’s talk about some other international comparisons that seem relevant to the current situation.

But public perception of our economic performance is strongly colored by rising prices. Inflation — the rate at which prices are rising — has subsided a lot, but prices haven’t and won’t come down

No matter what we did, many people were going to die — but the death toll was affected by politics, perhaps especially by the way vaccines became a front in the culture war. And America had a really bad pandemic, even compared with its peers. U.S. life expectancy was already lagging behind comparable countries’ by 2019, but the gap widened after Covid-19 struck.

On the other hand, the U.S. economy experienced an exceptionally strong bounce back from the pandemic recession. Even after adjusting for inflation, U.S. gross domestic product per capita is up 7 percent since the eve of the pandemic, greatly exceeding growth in other major wealthy economies

This would seem on the face of it to say something good about Biden’s economic policies.

Although we hear politicians on the campaign trail trying to make hay with the old Reagan-era question — Are you better off than you were four years ago? — there’s a lot of amnesia about what was actually happening in 2020, namely a deadly, terrifying pandemic

there have been huge recriminations against policymakers, both the Biden administration and the Federal Reserve, either for supposedly causing the bout of inflation or at any rate failing to prevent it.

the similarities between the wealthiest nations are more revealing than their differences.

Inflation surged almost everywhere after the pandemic. And if you take care to compare “apples to Äpfel” — to use the same consumer price measures — inflation has been remarkably similar in different countries.

Since the eve of the pandemic, the Harmonized Index of Consumer Prices has risen 19.6 percent in the United States and 19.8 percent in the euro area.

This strongly suggests that pandemic-related disruptions, rather than national policies, were inflation’s main driver.

Still, inflation rankles voters. Even when income growth exceeds inflation, as it has in the United States, people tend to feel that they earned their higher wages only to have them snatched away by higher prices

this is probably the most important reason that, according to tracking polls conducted by Morning Consult, every single leader of a Group of 7 nation is underwater, with more voters disapproving than approving of their leadership.

So who’s the winner of this unpopularity contest? Who has the least bad net approval? The answer is Joe Biden, with Giorgia Meloni of Italy a close second. The other Group of 7 leaders are even more unpopular

this has political consequences

every political analysis that says the fault for Biden’s low approval lies with the president and his campaign — that he’s too old (although that narrative, after suddenly peaking, mostly faded away after his State of the Union address) or is out of touch with the concerns of “real” Americans — needs to explain why he’s doing less badly than his foreign peers.