Deadly with extreme weather now, climate change is about to get so much worse. It is likely going to make the world sicker, hungrier, poorer, gloomier and way more dangerous in the next 18 years with an “unavoidable” increase in risks, a new United Nations science report says.
And after that watch out.
The UN Intergovernmental Panel on Climate Change report said Monday that if human-caused global warming isn’t limited to just another couple tenths of a degree, an Earth now struck regularly by deadly heat, fires, floods and drought in future decades will degrade in 127 ways, with some being “potentially irreversible.”
“The cumulative scientific evidence is unequivocal: Climate change is a threat to human well-being and planetary health,” says the major report designed to guide world leaders in their efforts to curb climate change. Delaying cuts in heat-trapping carbon emissions and waiting on adapting to warming’s impacts, it warns, “will miss a brief and rapidly closing window of opportunity to secure a liveable and sustainable future for all.”
Today’s children who may still be alive in the year 2100 are going to experience four times more climate extremes than they do now even with only a few more tenths of a degree of warming over today’s heat. But if temperatures increase nearly 2 more degrees Celsius from now (3.4 degrees Fahrenheit) they would feel five times the floods, storms, drought and heat waves, according to the collection of scientists at the IPCC.
Already at least 3.3 billion people’s daily lives “are highly vulnerable to climate change” and 15 times more likely to die from extreme weather, the report says. Large numbers of people are being displaced by worsening weather extremes. And the world’s poor are being hit by far the hardest, it says.
More people are going to die each year from heat waves, diseases, extreme weather, air pollution and starvation because of global warming, the report says. Just how many people die depends on how much heat-trapping gas from the burning of coal, oil and natural gas gets spewed into the air and how the world adapts to an ever-hotter world, scientists say.
“Climate change is killing people,” said co-author Helen Adams of King’s College London. “Yes, things are bad, but actually the future depends on us, not the climate.”
With every tenth of a degree of warming, many more people die from heat stress, heart and lung problems from heat and air pollution, infectious diseases, illnesses from mosquitoes and starvation, the authors say.
The report lists mounting dangers to people, plants, animals, ecosystems and economies, with people at risk in the millions and billions and potential damages in the trillions of dollars. The report highlights people being displaced from homes, places becoming uninhabitable, the number of species dwindling, coral disappearing, ice shrinking and rising and increasingly oxygen-depleted and acidic oceans.
Some of these risks can still be prevented or lessened with prompt action.
“Today’s IPCC report is an atlas of human suffering and a damning indictment of failed climate leadership,” United Nations Secretary-General Antonio Guterres said in a statement. “With fact upon fact, this report reveals how people and the planet are getting clobbered by climate change.”
The panel of more than 200 scientists puts out a series of these massive reports every five to seven years, with this one, the second of the series, devoted to how climate change affects people and the planet. Last August the science panel published a report on the latest climate science and projections for future warming, branded “code red” by the United Nations.
Climate scientist Katharine Hayhoe of The Nature Conservancy, who wasn’t part of the latest report, calls it the “Your House is on Fire” report.
“There’s real existential threats,” report co-chair Debra Roberts of South Africa told The Associated Press.
Since the last version of this impacts panel’s report in 2014, “all the risks are coming at us faster than we thought before,” said report co-author Maarten van Aalst, a climate scientist for the International Federation of Red Cross and Red Crescent Societies, mentioning floods, droughts and storms. “More of it will get really bad much sooner than we thought before.”
“Every bit of warming matters. The longer you wait… the more you will pay later,” said report co-chair Hans-Otto Poertner of Germany told the AP in an interview.
Since 2008, weather disasters have forced about 20 million people a year out of their homes as climate change refugees, with the future looking even grimmer in some places, according to the report.
By 2050, a billion people will face coastal flooding risk from rising seas, the report says. More people will be forced out of their homes from weather disasters, especially flooding, sea level rise and tropical cyclones.
“Some regions that are presently densely populated will become unsafe or uninhabitable,” the report says. And it says that small islands face that “overarching significant risk” of no longer being livable.
And eventually in some places it will become too hot for people to work outdoor, which will be a problem for raising crops, said report co-author Rachel Bezner Kerr of Cornell University.
Some of these climate change harms have been warned about for years, even decades, and have become reality, now written in the past and present tenses. Others are still warnings about future woes fast approaching.
Monday’s 36-page summary, condensed from more than 1,000 pages of analysis, was written by scientists and then edited line-by-line by governments and scientists with that final summary approved by consensus Saturday during a two-week virtual conference that occurred while Russia invaded Ukraine. In the final hours, a Ukrainian delegate made an impassioned plea that the war not overshadow the climate change report, some authors said.
“Climate change isn’t lurking around the corner waiting to pounce. It’s already upon us raining down blows on billions of people,” United Nations Environment Programme Director Inger Andersen said.
Study authors said much of Africa, parts of Central and South America, small islands and South Asia are “hot spots” for the worst harm to people and ecosystems.
The report has a new emphasis on the mental health toll climate change has taken, both on people displaced or harmed by extreme weather and on people’s anxiety level, especially youths worried about their futures.
If the world warms just another nine-tenths of a degree Celsius from now (1.6 degrees Fahrenheit), the amount of land burned by wildfires globally will increase by 35%, the report says.
And the rest of the living world won’t be spared either, with the report warning of climate change extinctions. Already two species — the mammal Bramble Cays melomys in Australia and Central America’s golden toad — have gone extinct because of climate change.
“The risk of extinction in biodiversity hotspots increases by about tenfold as warming rises from 1.5 to 3 degrees Celsius,” said Poertner, the German co-chair.
With just one more degree Celsius of warming (1.8 degrees Fahrenheit), 20% of the world’s species will become endangered, representing “severe biodiversity risk,” the report says.
One of the biggest changes in the report from previous versions emphasizes how crucial a key temperature threshold is scientifically and for people and how exceeding it, even if only a few decades, can cause permanent damage.
In the 2015 Paris agreement, the world adopted a goal of limiting warming to 1.5 degrees Celsius (2.7 degrees Fahrenheit) since pre-industrial times, which was then further cemented when a special IPCC report in 2018 showed massive harms beyond that 1.5 degree mark. This new report found that threshold is even more important, but scientists do note that the world does not fall off a cliff after that mark.
Because the world is already 1.1 degrees (2 degrees Fahrenheit) warmer than pre-industrial time and emissions are still rising, not falling, the vast majority of future scenarios show temperatures are on track to shoot well above 1.5 degrees, hitting the mark in the 2030s. So some officials began to count on going over that threshold and coming back down a decade or so later with still-to-be-proven expensive technology to suck carbon out of the air or by some other means.
Monday’s report says that if that overshoot happens, “then many human and natural systems will face additional severe risks… some will be irreversible, even if global warming is reduced.”
Countries need to do more to adapt to warming, with rich countries needing to do a better job giving financial help to poorer nations to adjust to climate change caused mostly by the developing world, the report says. But there are limits to what adapting can accomplish and sometimes — like in the case of sea walls — technical fixes to lessen harms in one place will make it worse somewhere else, the report says.
“This has to be a whole of society response. Not a single individual, community, city or government can opt out,” South African co-chair Roberts said in a Monday press conference. “While action is happening, it’s not rapid enough and it’s uneven.”
Amid all the danger signs, experts said they want to shy away from doom.
“Fear is not a good advisor and never is,” German vice chancellor and minister for climate and economy Robert Habeck told the AP. “Hope is the right one.”
Hayhoe said what’s needed is realism, action and hope.
“It’s really bad and there’s a good chance that it will get worse,” Hayhoe said. “But if we do everything we can, that will make a difference. Our actions will make the difference… That’s what hope is.”
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Associated Press reporter Frank Jordans contributed from Berlin.
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Read more of AP’s climate coverage at http://www.apnews.com/Climate
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Follow Seth Borenstein on Twitter at @borenbears
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Associated Press climate and environmental coverage receives support from several private foundations. See more about AP’s climate initiative here. The AP is solely responsible for all content.
‘Crisis’: Climate panel flags Great Barrier Reef devastation
SYDNEY (AP) — It was the silence of the sea that first rattled the teenage snorkeler, followed by a sense of horror as she saw the coral below had been drained of its kaleidoscopic color. This once-vibrant site on Australia’s Great Barrier Reef — a site she’d previously likened to a busy capital city — had become a ghost town, the victim of yet another mass bleaching event.
On that day in 2020, Ava Shearer got out of the water and cried. Today, with the release of a United Nations climate report that paints a dire picture of the Great Barrier Reef’s future, the now-17-year-old marine science student and snorkeling guide wonders what will be left of the imperiled ecosystem by the time she finishes her degree at Australia’s James Cook University.
“I definitely worry about it,” says Shearer, who grew up along the World Heritage-listed natural wonder off Australia’s northeast coast. “I fear there might not be anything for me to study.”
There is much for the world to fear in Monday’s Intergovernmental Panel on Climate Change (IPCC) report, which bluntly states that the Great Barrier Reef is in crisis and suffering grave impacts from climate change, with frequent and severe coral bleaching caused by warming ocean temperatures. The worst bleaching event, in 2016, affected over 90% of the reef, and a punishing succession of bleaching incidents has left the northern and middle portion of the reef system in a “highly degraded state,” the report said.
The Great Barrier Reef is the largest living structure on the planet — so large, in fact, that it is the only living thing on earth visible from space. It stretches over 2,300 kilometres (1,400 miles) and is home to more than 1,500 species of tropical fish, plus dolphins, whales, birds, and even giant, century-old clams. Pre-pandemic, it contributed 6.4 billion Australian dollars (US$4.6 billion) to the economy every year, largely thanks to tourism, and typically supports around 64,000 jobs.
That bleaching will continue along the reef is a virtual certainty, according to the IPCC. Perhaps even more ominously, the report suggests it may simply be too late to stop bleaching entirely. Even if the global community achieves its goal of limiting future warming to 1.5 degrees Celsius (2.7 degrees Fahrenheit) since pre-industrial times, that still wouldn’t be sufficient to prevent more frequent mass bleaching events, though it may reduce their occurrence, the IPCC found.
The report predicts that ocean warming and marine heatwaves will cause the loss and degradation of tropical shallow coral reefs, leading to “widespread destruction” of coral reef ecosystems. The report points to three previous mass bleaching events from 2016 to 2020 that caused significant coral loss, and warns that there has been “mass mortality” of some coral species.
For those who struggle to understand how devastating bleaching is, diver Tony Fontes likens it to a wildfire under the ocean. Fontes, who recently retired after 40 years as a diving instructor on the Great Barrier Reef, remembers diving on reefs that had recently been bleached and swimming through water that had turned milky-white from dead coral tissue. He would emerge covered in slime.
“You sit on the boat trying to wash it off and you just realize you’ve just swum across a reef that a couple weeks ago was full of life and vibrant and now a bushfire has gone through it and the coral is dead, and the rest of the marine life will just have to move on or die off,” he says. “It’s a really, really sad, heart-wrenching experience.”
Yet despite the looming threat in its own back yard, Australia has lagged behind other wealthy countries in its greenhouse gas emissions reduction performance and pledges. Last year, a climate think tank ranked Australia as the worst climate performer among comparable developed countries since nations pledged in the 2015 Paris climate agreement to limit global warming.
The issue is politically fraught in Australia, which is one of the world’s largest exporters of coal and liquified natural gas, and one of the highest greenhouse gas emitters per capita because of its heavy reliance on coal-fired power. Last month, the government pledged to spend another AU$1 billion over nine years improving the reef’s health, but critics argued that the money would do nothing to address rising ocean temperatures, the main threat to coral.
The consequences of inaction go beyond the ecological to the economical: If bleaching persists, the IPCC estimates 10,000 jobs and AU$1 billion in revenue would be lost every year from declines in tourism alone.
Around a billion people worldwide rely on coral reefs for their everyday living, says Scott Heron, a physics professor and reef science expert at James Cook University. Which is why, he says, a failure to urgently reduce greenhouse gas emissions could have devastating effects for humanity.
“It’s going to affect real people and real people’s lives,” Heron says. “It’s going to make a massive change to not just people in Australia, but people who subsist on reef services. And so we’re really putting this into a frame of endangering human life.”
Beyond the reef, the report warns that climate change will lead to a surge in heat-related deaths in Australia, the extinction of certain animal species, and more wildfires. Koalas are at risk of local extinctions due to increasing drought and rising temperatures, the IPCC said. And rising sea levels and storm surges led to the recent extinction of a rodent species called Bramble Cay melomys, which lived on a remote cay in the northern Great Barrier Reef, the report said.
The frequency and severity of dangerous wildfire conditions is already increasing, due in part to climate change, the IPCC said, citing the catastrophic “Black Summer” fires of late 2019 and early 2020 that killed at least 33 people and destroyed more than 3,000 homes. Even Australia’s famed eucalyptus trees, which are naturally resilient to the country’s seasonal fires, may not be able to withstand the ferocity and frequency of the predicted blazes, which could lead to the decimation of forests, the IPCC warned.
“We’re seeing conditions which really weren’t projected for some decades … and yet they’re appearing pretty much now, and so to some extent we could well be under-estimating the risks associated with things like fires,” says IPCC vice-chair Mark Howden, director of the Institute for Climate, Energy and Disaster Solutions at the Australian National University.
Still, despite the grim predictions, Howden urges Australians not to lose hope and to focus instead on solutions, primarily by reducing greenhouse gas emissions, but also by reducing other reef stressors such as over-fishing. The report also provides extensive lists of climate adaptation strategies, such as improving building standards so that homes stay cooler during potentially deadly heatwaves.
“Does this report identify whole areas Australians should be concerned about? Absolutely, and it would be hard to understate the comprehensiveness and significance of those impacts,” Howden says. “Does it also portray a whole series of things that we can take action on which take the sting out of the worst-case scenarios in the future? Absolutely.”
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Associated Press climate and environmental coverage receives support from several private foundations. See more about AP’s climate initiative here. The AP is solely responsible for all content.