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Extreme weather events are displacing millions, creating new tensions between neighbors, and demanding coordinated military responses. Will world leaders do what is needed to meet the challenge?
Bangladesh was still reeling from political turmoil, which felled Prime Minister Sheikh Hasina’s government on August 5, when a flood disaster struck out of the blue, upending the lives of 6 million Bangladeshis. Half a million people were left to their own devices, beyond the reach of first responders. Worst of all, 2 million children were exposed to the aftermath of flooding. Dhaka had not seen a deluge like this in the past three decades. Yet the country is no stranger to disasters. Just in May this year, it was battered by Storm Remal, devastating millions. In 2023, it was Cyclone Mocha that visited its wrath on two neighboring states: Bangladesh and Myanmar.
The speed and severity of flash floods is equally quick to inflame geopolitical tensions, as Dhaka accused neighboring India aggravating the situation by opening the floodgates of a dam in a neighboring state. India denied the charge and blamed erratic monsoons for swelling the transboundary Gomati River that overflowed its banks. Bangladesh and India share 54 transboundary rivers, including the Ganges and Yamuna. As an upstream country, India is viewed with suspicion by downstream Bangladesh. All downstream nations suspect their upstream neighbors in the event of such calamities. For its part, India blames upstream China for major diversions on transboundary rivers. Similar accusations are heard among 11 riparian nations on the Nile. All this shows how climate change shapes geopolitics.
Each time a developing nation is struck by an epic calamity, it takes 10-20 years to fully recover from the impact. Disasters worsen the preexisting vulnerabilities of those affected, hindering their recovery. Viewing these impacts, Bangladesh estimates that 20 million of its citizens will become “climate refugees” in the next 25 years, while 30 million are set to lose everything from climate change. It wants Western nations to recognize climate refugees as they do victims of “political repression.” Rajendra Pachauri, a former chairperson of the United Nations Intergovernmental Panel on Climate Change (IPCC), echoes Dhaka’s call for what he describes as “managed migration.” Unmanaged migration, however, continues. There are already 13 million Bangladeshis settled in Europe, North America, and the Middle East.
How ironic it is that 200 world leaders at the climate summit (COP29) in Baku, Azerbaijan this November, will be fighting tooth and nail to commit the least possible amount to the $100 billion global climate fund, which is basically a cleanup cost of climate change.
The ferocity of monsoons is forcing millions from their native habitats. Monsoons smash riverbanks, deluging countries on a monumental scale. Although shorter in duration, monsoons pack crushing punches. In 2022, southeastern Pakistan had received triple the amount of monthly rain in just one day. Monsoons are being fueled by the ever-warmer oceans that burst “atmospheric rivers.” The Bay of Bengal, where monsoons rise, and the Indian Ocean, which is the world’s fastest-warming ocean, are literally blazing. Asia’s sea surface temperature is warming more than three times faster than the global average. The continent’s land surface temperature has already surpassed the maximum threshold of 1.5°C to which the world agreed in Paris in 2015. Asia’s highest surface temperature in 2023 was recorded as 1.92°C above the 1961-1990 level (not the preindustrial level).
Asian countries such as Bangladesh, which have made the least contribution to carbonizing the atmosphere, are the most affected. In 2013, IPCC, in its fifth assessment report, predicted “less frequent but more intense” extreme weather events around the globe. Mother Nature, somehow, seems far ahead of the United Nations. As the case of Bangladesh shows, storms that are making landfalls around the world, are as frequent as they are intense. Weeks after the U.N.’s fifth assessment report came out, the Philippines endured typhoon Haiyan that killed 10,000 Filipinos, unleashing its fury on 13 million, 5 million of them children. Economic losses were valued at $15 billion (5% of the Philippine economy in 2013). Haiyan was then declared the strongest-ever superstorm in meteorological annals. Now scientists are thinking about adding a sixth hurricane category as Category 5 hurricanes are becoming passe.
Yet the world is far from equipped to tame climatic disasters. Haiyan, for instance, packed wind gusts of up to 235 miles per hour, a wind velocity that is almost twice the speed of the yet-to-be-invented Category 6 hurricane. Manila deployed 18,177 military troops, 844 vehicles, 44 seagoing vessels, and 31 aircraft to deal with the problem, and it still wasn’t enough. It had to call in military reinforcements from Australia, Britain, China, Japan, and the United States. The Philippines never faced a national adversary with a fraction of Haiyan’s lethality.
The United States committed the largest of all military resources to support the Philippines. It commissioned the nuclear-powered aircraft carrier USS George Washington with 80 aircraft and 5,000 troops aboard, in addition to four additional naval ships. Britain sent the Illustrious aircraft carrier stocked with transport planes and medical personnel. Japan sent a naval force of 1,000 troops, which was Tokyo’s largest-ever disaster-relief deployment, with three navy ships led by the Ise, Japan’s largest warship. Yet Haiyan kept all these naval deployments from entering the “disaster zone” for three days until November 11. By then, it had already made history as the Philippine deadliest storm.
Seven years later, in 2020, Australia had the lengthiest season of climate-driven wildfires, the intensity of which the The New York Times described in a breathtaking headline as “an atomic bomb.” For the first time in its history, Australia issued a “compulsory call-out” of its Defense Force Reserve Brigades, and deployed thousands of soldiers, sailors, and airmen to battle the raging fires and help evacuations. Yet the Australian military alone was no match for the blazes. Seventy countries, including Canada, New Zealand, Singapore, and the United States, offered assistance. The economic cost of fires was put at $103 billion. Worst of all, 1 billion animals were burned to death in this climate-fueled inferno.
The Asia-Pacific is set to see the economic tab of climatic disasters double to $1.4 trillion a year (which is 4.2% of regional GDP). By the middle of the 21st century, the global toll of climate-driven calamities will reach $38 trillion a year. How ironic it is that 200 world leaders at the climate summit (COP29) in Baku, Azerbaijan this November, will be fighting tooth and nail to commit the least possible amount to the $100 billion global climate fund, which is basically a cleanup cost of climate change. Yet they have no remorse in having future generations pay $38 trillion a year as a penalty for climate breakdown. The cost of all wars, including world wars, fought in the 20th century is not nearly as much as this amount.
It is, however, heartening that the climate envoy John Podesta has announced U.S. support for Azerbaijan’s initiative of the New Collective Quantified Goal on climate finance. In a U.S.-China Working Group meeting in Beijing in September, Podesta urged China to support this initiative. Both will cohost a summit of world leaders assembled at COP29 to urge more aggressive cuts in greenhouse gas emissions. In all of this, climate change is defining itself in geopolitics.
New research shows that a mix of natural forest regrowth and tree planting could remove up to 10 times more carbon at $20 per metric ton than previously estimated by the IPCC.
Trees are allies in the struggle against climate change, and regrowing forests to capture carbon may be cheaper than we thought. According to new research published in Nature Climate Change, a strategic mix of natural regrowth and tree planting could be the most cost-effective way to capture carbon.
Researchers analyzed reforestation projects in 138 low- and middle-income countries to compare the costs of different reforestation approaches. They found it’s possible to remove 10 times more carbon at $20 per metric ton, and almost three times more at $50, compared to what the Intergovernmental Panel on Climate Change (IPCC) had previously estimated.
"It's exciting that the opportunity for low-cost reforestation appears much more plentiful than previously thought."
Neither natural regeneration nor tree planting consistently outperforms the other. Instead, the most cost-effective method varies depending on local conditions. Natural regeneration, which involves letting forests regrow on their own, is cheaper in about 46% of suitable areas. Tree planting, on the other hand, is more cost-effective in 54% of areas.
“Natural regeneration is more cost-effective in areas where tree planting is expensive, regrowing forests accumulate carbon more quickly, or timber infrastructure is distant,” said lead author Jonah Busch, who conducted the study while working for Conservation International. “On the other hand, plantations outperform in areas far from natural seed sources, or where more of the carbon from harvested wood is stored in long-lasting products.”
The research team estimates that by using the cheapest method in each location, we could remove a staggering 31.4 billion metric tons of carbon dioxide from the atmosphere over 30 years, at a cost of less than $50 per metric ton. This is about 40% more carbon removal than if only one method was used universally.
“It’s exciting that the opportunity for low-cost reforestation appears much more plentiful than previously thought; this suggests reforestation projects are worth a second look by communities that might have prejudged them to be cost prohibitive,” said Busch. “While reforestation can’t be the only solution to climate change, our findings suggest it should be a bigger piece of the puzzle than previously thought.”
To reach these conclusions, the research team gathered data from hundreds of reforestation projects and used machine-learning techniques to map costs across different areas at a 1-kilometer (0.6-mile) resolution. This detailed approach allowed them to consider crucial factors such as tree growth rates and potential species in different regions.
Ecologist Robin Chazdon, who wasn’t involved in the research, praised the comprehensive approach but highlighted important considerations beyond cost-effectiveness.
“These eye-opening findings add nuance and complexity to our understanding of the net costs of carbon storage for naturally regenerating forests and monoculture plantations,” Chazdon said. However, she emphasized that “the relative costs of carbon storage should not be the only factor to consider regarding spatial planning of reforestation.”
Chazdon pointed out some of the ecological trade-offs involved in different reforestation methods. Monoculture tree plantations, while potentially cost-effective in certain areas, often create excessive water demand and provide poor opportunities for native biodiversity conservation. In contrast, naturally regenerating forests typically offer a wider range of ecosystem services and better support local biodiversity.
“Ultimately, these environmental costs and benefits — which can be difficult to monetize — need to be incorporated in decisions regarding how and where to grow plantations or foster natural regeneration,” Chazdon said.
The study’s authors acknowledge these limitations and suggest several directions for future research. They propose extending the analysis to high-income countries and exploring other forms of reforestation, such as agroforestry or planting patches of trees and allowing the rest of an area to regrow naturally.
Additionally, the researchers emphasize the need to integrate their findings on cost-effectiveness with data on biodiversity, livelihoods and other societal needs to guide reforestation efforts in different contexts.
While the study’s findings are promising, the researchers caution that reforestation alone won’t solve the climate crisis. Even at its maximum potential, reforestation would only remove as much carbon dioxide in 30 years as eight months of current global emissions.
Reforestation is very important, but it won’t solve climate change on its own, Busch said. Ultimately, “we still need to reduce emissions from fossil fuels.”
"This alarming record underlines the need to urgently phase out fossil fuels, and to hugely increase climate finance," said one campaigner.
Scientists on Monday underscored the urgent need to accelerate the transition from fossil fuels to renewable energy following the publication of data from the European Union's climate change monitor showing that last month was the hottest June ever recorded and that 2024 is likely to be the planet's hottest year on record.
Each month since June 2023 has been the hottest since records have been kept, the European Union's Copernicus Climate Change Service (C3S) said last week in its latest monthly bulletin.
According to the agency, June "was 1.50°C above the estimated June average for 1850-1900, the designated preindustrial reference period, making it the 12th consecutive month to reach or break the 1.5°C threshold."
"European temperatures were most above average over southeast regions and Turkey, but near or below average over western Europe, Iceland, and northwestern Russia," C3S noted. "Outside Europe, temperatures were most above average over eastern Canada, the western United States and Mexico, Brazil, northern Siberia, the Middle East, northern Africa, and western Antarctica."
"Temperatures were below average over the eastern equatorial Pacific, indicating a developing La Niña, but air temperatures over the ocean remained at an unusually high level over many regions," the agency added.
C3S Director Carlo Buontempo said in a statement Monday that "even if this specific streak of extremes ends at some point, we are bound to see new records being broken as the climate continues to warm."
"This is inevitable unless we stop adding greenhouse gases into the atmosphere and the oceans," he stressed.
In an interview with The Associated Press published Monday, C3S climate scientist Nicolas Julien called the new data "a stark warning that we are getting closer to this very important limit set by the Paris agreement."
"The global temperature continues to increase," he added. "It has at a rapid pace."
Zeke Hausfather, a researcher at the California-based nonprofit Berkeley Earth, toldReuters, "I now estimate that there is an approximately 95% chance that 2024 beats 2023 to be the warmest year since global surface temperature records began in the mid-1800s."
As Reuters reported Monday:
The changed climate has already unleashed disastrous consequences around the world in 2024. More than 1,000 people died in fierce heat during the Hajj pilgrimage last month. Heat deaths were recorded in New Dehli, which endured an unprecedentedly long heatwave, and amongst tourists in Greece.
"This is not good news at all," Aditi Mukherji, who co-authored the most recent Intergovernmental Panel on Climate Change (IPCC) report, toldThe Guardian.
"We know that extreme events increase with every increment of global warming," she added, "and at 1.5°C, we witnessed some of the hottest extremes this year."
The Guardiansurveyed hundreds of IPCC authors earlier this year. Three-quarters of them said they expect Earth to heat by at least 2.5°C by the end of this century. Half of the surveyed scientists expect temperatures to rise above 3°C by 2100.
"It is a crisis," said Mukherji, and one that has a clear solution, given that burning fossil fuels is the leading cause of global heating.
Antonia Juhasz, a senior researcher on fossil fuels at Human Rights Watch, toldNation of Change that "as a result of the burning of fossil fuels, heatwaves are becoming more common, and intense heatwaves are more frequent."
"We can break the cycle, we can make oil companies stop burning fossil fuels," she added.
Reacting to the latest C3S data, Amnesty International climate adviser Ann Harrison said on social media that "this alarming record underlines the need to urgently phase out fossil fuels, and to hugely increase climate finance."