‘Monumental Decision’: Biden Admin Proposes Ending Coal Leasing in Nation’s Most Productive Mining Area

The United States Department of the Interior’s Bureau of Land Management (BLM) has proposed the ending of new coal leases on federal land in Montana and Wyoming’s Powder River Basin (PRB) — the nation’s most productive area for the highly polluting fossil fuel.

The new proposal would impact millions of acres of mineral reserves on federal lands, reported The Associated Press. However, the short-term effects will likely be limited since the leases take years to develop and there is less demand for coal.

“This is a monumental decision that will save lives, safeguard our environment, and significantly cut carbon emissions in the United States,” said Drew Caputo, Earthjustice vice president of litigation for lands, wildlife, and oceans, in a press release from Earthjustice. “We are grateful that the Biden administration has shown the courage to end coal leasing in the Powder River Basin and at long last turn the page on this climate-destroying fuel.”

BLM has issued the final version of a supplemental impact statement (SEIS), as well as an amendment to the land use plan for its Buffalo Field Office, a press release from BLM said.

BLM developed the amendment and SEIS in response to a federal court order from 2022.

“The BLM’s proposed alternative, Alternative A, would amend the 2015 Buffalo Field Office resource management plan and make BLM-managed coal resources in the planning areas unavailable for future leasing. Federal coal production is anticipated to continue through 2041 under existing leases,” the BLM press release said.

The SEIS looks at alternatives to Buffalo Field Office federal coal leases and provides updated data and analysis of the health impacts of fossil fuel development in the area.

In 2022, the 12 surface coal mines that were active in the region produced roughly 220 million “short tons” of coal, down from approximately 400 million tons 14 years earlier.

The Energy Information Administration has said that coal production in both the PRB and the U.S. peaked in 2008 and have declined sharply since.

The proposal brought criticism from Republicans in Congress on the heels of a new air quality regulation by President Joe Biden that could lead to coal-fired plants being shut down if they don’t reduce their pollution, The Associated Press reported.

Environmentalists said the new proposal indicates a shift in the country’s coal policy.

“Coal companies in this region already have decades of coal locked up under leases, and it’s hard to imagine they’ll find buyers that far into the future given the competition from more affordable energy sources,” said Mark Fix, a Montana rancher who belongs to the conservation group Northern Plains Resource Council, as reported by The Associated Press.

Government analyses of the BLM proposal have said stopping federal coal leases would lower carbon dioxide emissions from the fossil fuel equal to 293 million tons annually — about the same as produced by 63 million gas-powered vehicles.

“The BLM’s decision to end coal leasing is a sea change in the transition to clean energy,” said Derf Johnson, Montana Environmental Information Center’s deputy director, in the press release from Earthjustice. “As we wind down the coal mining in the PRB, there is an immense opportunity to continue growing the clean energy economy.”

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60.5% of World’s Coral Reefs Have Bleached in Past Year, NOAA Says

In the past year, nearly two-thirds of the coral reefs on the planet have been exposed to enough heat stress to trigger bleaching, the United States National Oceanic and Atmospheric Administration (NOAA) said on Thursday, reported Reuters.

Last month, NOAA announced that coral reefs are experiencing a fourth global bleaching event, with El Niño and climate change combining to bring record high ocean temperatures.

“I am very worried about the state of the world’s coral reefs,” said Derek Manzello, coordinator for NOAA’s Coral Reef Watch, as Reuters reported. “We are seeing (ocean temperatures) play out right now that are very extreme in nature.”

Coral bleaching happens when warm ocean surface temperatures cause the colorful algae that live in the tissues of corals to be expelled. Without the symbiotic benefits of the algae, corals turn pale and become vulnerable to disease and starvation.

The current worldwide bleaching event is the second in the past decade, a press release from NOAA said.

“From February 2023 to April 2024, significant coral bleaching has been documented in both the Northern and Southern Hemispheres of each major ocean basin,” Manzello said in the press release.

Since early last year, mass coral bleaching has been confirmed in the Caribbean, Florida, Brazil, Australia’s Great Barrier Reef, the eastern Tropical Pacific, large swaths of the South Pacific, the Gulf of Aden, the Red Sea, the Persian Gulf and other areas of the Indian Ocean.

“As the world’s oceans continue to warm, coral bleaching is becoming more frequent and severe. When these events are sufficiently severe or prolonged, they can cause coral mortality, which hurts the people who depend on the coral reefs for their livelihoods,” Manzello added.

Mass coral bleaching has been documented in at least 62 nations and territories, reported Reuters.

During the previous global event — from 2014 to 2017 — 56.1 percent of coral reefs were subjected to heat stress sufficient to cause bleaching. Another event in 2010 affected 35 percent of reef area, while the first worldwide bleaching in 1998 struck 20 percent of reefs.

“Climate model predictions for coral reefs have been suggesting for years that bleaching impacts would increase in frequency and magnitude as the ocean warms,” said Jennifer Koss, NOAA’s Coral Reef Conservation Program director, according to NOAA.

NOAA noted that Atlantic Ocean corals have been most affected by rising ocean temperatures. Nearly all — 99.7 percent — of the reefs in the basin have been subjecting to heat stress leading to bleaching over the last year, Reuters reported.

Corals are likely to suffer more this summer, with the Southern Caribbean already accumulating heat stress at bleaching levels in some areas.

“This is alarming because this has never happened so early in the year before,” Manzello said, as reported by Reuters. “El Nino is dissipating, but the ocean is still anomalously hot. It won’t take much additional warming to push temperatures past the bleaching threshold.”

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Oakland School District Transitions to 100% Electric Bus Fleet

The Oakland Unified School District (OUSD) in the Bay Area of California is set to fully transition its school bus fleet to electric buses. With this move, it is expected to become the first big school district in the U.S. to switch to 100% electric buses with vehicle-to-grid (V2G) capabilities.

The school district has partnered with Zūm, a school transportation services company, to acquire a fleet of 74 entirely electric buses. In addition, the school district will receive bidirectional chargers, which can not only charge the buses but send stored or excess energy from the vehicles back to the grid.

This means the fleet of electric buses and chargers will double as a virtual power plant (VPP). Zūm reported the OUSD fleet VPP is expected to send 2.1 gigawatt hours (GWh) per year back to the grid, which will save about 25,000 tons of emissions.

“Oakland becoming the first in the nation to have a 100% electric school bus fleet is a huge win for the Oakland community and the nation as a whole,” said Kim Raney, executive director of transportation at Oakland Unified School District, as reported by Smart Energy International. “The families of Oakland are disproportionately disadvantaged and affected by high rates of asthma and exposure to air pollution from diesel fuels. Providing our students with cleaner and quieter transportation on electric school buses will be a game changer ensuring they have an equitable and stronger chance of success in the classroom.”

OUSD and Zūm are collaborating with the U.S. Environmental Protection Agency (EPA) via its Clean School Bus program, California Air Resource Board via the Heavy Vehicle Incentive Program, the Bay Area Air Quality Management District, Clean Mobility Operations programs and Pacific Gas and Electric Company (PG&E) to electrify OUSD’s fleet.

According to the California Air Resources Board, OUSD’s fleet transports 1,300 students to and from school each day. Soon, students will be able to ride emissions-free, electric buses in an area vulnerable to poor air quality. A recent American Lung Association report found that Alameda County is one of the most polluted counties to live in the U.S.; Oakland is located in Alameda County.

Countrywide, student transportation has more than 500,000 school buses, with 90% of these buses using fossil fuels for power. This contributes 8.4 million tons of emissions per year, Zūm reported.

Zūm has set a target to help electrify 10,000 buses in the U.S. and plans to work toward electrifying the larger transportation fleets for San Francisco Unified School District and Los Angeles Unified School District, Electrek reported.

“We at Zūm strongly believe it is time to move beyond pilots and deploy sustainability solutions at scale. Converting the Oakland Unified school bus fleet to 100% electric with VPP capability is the right step in that direction,” Ritu Narayan, founder and CEO of Zūm, said in a statement. “This historic milestone is a win-win proposition: Electric school buses with V2G provide students with cleaner, fume-free transportation and allow us to send untapped energy from the bus batteries back to the grid, creating an enormous impact on grid resilience.”

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Southeast Asia’s Deadly Heat Wave in April Was 45x More Likely Due to Climate Change, Study Finds

A new World Weather Attribution (WWA) study has found that the sweltering late-April heat wave across Southeast Asia and the Middle East was 45 times more likely due to human-caused climate change.

For many days, temperatures above 104 degrees Fahrenheit scorched large portions of the continent, from Lebanon, Syria, Palestine and Israel to Vietnam, the Philippines, Myanmar and Thailand.

“From Gaza to Delhi to Manila, people suffered and died when April temperatures soared in Asia,” said Dr. Friederike Otto, a member of the WWA study team and a senior lecturer in climate science at the Grantham Institute for Climate Change and the Environment in London, as The Guardian reported. “The additional heat, driven by emissions from oil, gas and coal, is resulting in death for many people.”

The study said global heating increased temperatures by nearly two degrees Celsius in Syria, Jordan, Lebanon, Palestine and Israel. In the Philippines, thousands of schools were shuttered amid soaring temperatures.

“In terms of intensity, we estimate that a heatwave such as this one in West Asia is today about 1.7°C warmer than it would have been without the burning of fossil fuels. In the Philippines the intensity increase due to human-induced climate change is about 1.2°C,” WWA said.

In India, Myanmar, Vietnam, Laos, Bangladesh, Thailand and Cambodia, temperatures reached 114.8 degrees Fahrenheit.

“Climate change is an absolute gamechanger when it comes to extreme heat,” Otto said.

The heat wave was especially hard for outdoor workers and those living in informal housing and refugee camps.

“Heat impacts certain groups like construction workers, transport drivers, farmers, fishermen etc. disproportionately. It both impacts their livelihoods and causes a reduction in income, and results in personal health risks,” WWA said. “The heatwave added pressure to the many challenges already faced by people in refugee camps and conflict zones, such as water shortages, difficulties to access medicines and poor living conditions for the large population that lives in makeshift tents that trap heat. With limited institutional support and options to adapt, the heat increases health risks and hardship.”

The research team combined climate models and weather data to compare how likely heat waves would be in the current climate and in one without human-caused global heating.

They found that El Niño had little effect on a higher chance of heat waves.

“Heatwaves are arguably the deadliest type of extreme weather event and while the death toll is often underreported, hundreds of deaths have been reported already in most of the affected countries, including Palestine, Bangladesh, India, Thailand, Myanmar, Cambodia and the Philippines,” WWA said. “The heat also had a large impact on agriculture, causing crop damage and reduced yields, as well as on education, with holidays having to be extended and schools closed in several countries, affecting millions of students.”

The team said South Asia’s heat is becoming more frequent during the pre-monsoon season.

They examined how human-caused climate change affected the intensity and likelihood of the 15-day heat wave in the Philippines and the three-day West Asia.

“The observational data for the whole month of April confirmed that the role of climate change is likely of similar magnitude to the heatwaves studied in 2022 and 2023, and the results of a full attribution analysis would not be significantly different,” WWA said.

In Gaza, the hot temperatures made living conditions more dire for 1.7 million displaced people.

The study said that, if the planet reaches warming of two degrees Celsius above pre-industrial levels, the probability of extreme heat rises significantly.

“If the world warms to 2°C above pre-industrial global mean temperatures, in both regions the likelihood of the extreme heat would increase further, by a factor of 2 in West Asia and 5 over the Philippines, while the temperatures will become another 1°C hotter in West Asia and 0.7°C hotter in the Philippines,” WWA said.

The study’s findings in South Asia were based on observations.

“Similarly to what we found in previous studies, we observe a strong climate change signal in the 2024 April mean temperature. We find that these extreme temperatures are now about 45 times more likely and 0.85ºC hotter. These results align with our previous studies, where we found that climate change made the extreme heat about 30 times more likely and 1ºC hotter,” WWA explained.

The findings suggest that strategies and action plans to combat existing heat waves face challenges due to rapidly growing cities, exposed populations, an increase in informal settlements, a rise in energy demands and a reduction of green spaces.

“While many cities have been implementing solutions like cool roofs, nature based infrastructure design, and adherence to climate risk informed building codes, there is limited focus on retrofitting and upgrading of existing buildings and settlements, with infrastructure deficits (e.g. asbestos roofs), to make them more liveable,” WWA emphasized. “Some countries such as India have comprehensive heat action plans in place, yet to protect some of the most vulnerable people, these must be expanded with mandatory regulations, such as workplace interventions for all workers to address heat stress.”

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Florida’s DeSantis Signs Law Removing Most References to Climate Change, Banning Offshore Wind

Florida Governor Ron DeSantis signed legislation on Wednesday that eliminates climate change as a priority in state policymaking, as well as most references to it in state law. Florida is known as one of the most climate-vulnerable states in the country due to its susceptibility to sea level rise, hurricanes and flooding.

The new legislation, which will take effect on July 1, also weakens natural gas pipeline regulations and bans offshore wind turbines off the Florida coast, reported The Washington Post.

“The legislation I signed today — HB 1645, HB 7071, and HB 1331 — will keep windmills off our beaches, gas in our tanks, and China out of our state,” DeSantis said in a social media post on Wednesday. “We’re restoring sanity in our approach to energy and rejecting the agenda of the radical green zealots.”

With solar energy thriving in the state, some climate advocates have said the new law would not have much impact on Florida’s transition toward renewable energy, The Washington Post reported. It also isn’t a big target of the wind industry due to its generally low winds.

Environmentalists said the new regulations dismissed the many climate-related threats facing the state, reported The Hill.

“It is extremely alarming that leaders in Tallahassee have eliminated statutory language that recognized the dangers of climate pollution, the importance of energy efficiency, and realities of increasing extreme weather events due to a warming planet,” Yoca Arditi-Rocha, executive director of the Miami-based climate advocacy organization CLEO Institute, said in a statement, as The Hill reported.

In a recent survey conducted by Florida Atlantic University, 90 percent of the state’s residents said they accepted the reality of climate change, while 69 percent supported the state taking action to address the crisis.

Greg Knecht, Florida’s Nature Conservancy director, commented that the legislation “is very much out of line with public opinion,” reported The Washington Post.

Knect said that, while Republicans have directed millions of dollars toward flood control projects, they also portray the reduction of carbon pollution as radical.

“On one hand, we recognize that we’re seeing flooding and we’re seeing property damage and we’re seeing hurricanes, and we’re conveying to the public that we can build our way out of these problems,” Knecht said. “And then on the other hand, we’re turning around and saying, ‘Yeah, but climate change isn’t really real, and we don’t need to do anything about it.’”

In addition to eliminating “climate change” from state policy, the regulations took away language that gave state officials the power to set targets for increasing green energy.

“What Florida is really doing is saying we’re going to deemphasize any policies that would help mitigate climate change,” said Emily Hammond, a George Washington University professor of law, as CNN reported.

Government agencies are also no longer required to consult a list of “climate-friendly” products, hold meetings in “green lodging” hotels or make fuel efficiency a priority in the purchase of new vehicles, reported The Washington Post.

“Floridians are on the frontlines of rising sea levels, rising extreme heat, rising property insurance prices, more frequent flooding, and more severe storms. This purposeful act of cognitive dissonance is proof that the Governor and the State Legislature are not acting in the best interests of Floridians, but rather to protect profits for the fossil fuel industry,” Arditi-Rocha said, as The Hill reported.

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Scientists Use Solar Power to Generate Enough Heat to Smelt Metal

Industrial processes like smelting metals or manufacturing cement can be carbon-intensive, as they typically rely on fossil fuels to generate enough energy to produce high temperatures. But researchers have found a way to use solar thermal trapping, rather than fossil fuels, to reduce the emissions of some industrial processes.

“To tackle climate change, we need to decarbonize energy in general,” said corresponding author Emiliano Casati, of ETH Zurich, Switzerland, as reported by Science Daily. “People tend to only think about electricity as energy, but in fact, about half of the energy is used in the form of heat.”

Scientists used semitransparent materials, including synthetic quartz, to capture sunlight with a thermal trapping effect. The team connected a synthetic quartz rod, partially lined with platinum, to an opaque silicon carbide disk, which would absorb the sunlight, and exposed one end of the quartz rod to concentrated solar radiation.

After exposing one end of the rod to the concentrated solar radiation, the silicon carbide disk reached 1,050 degrees Celsius (1,922 degrees Fahrenheit), hot enough for smelting metal or cooking cement, among other industrial processes. While that end reached over 1,000 degrees Celsius, the other end of the quartz rod stayed at a temperature of 600 degrees Celsius (1,112 degrees Fahrenheit). The researchers published their findings in the journal Device.

Thermal trapping is not a new concept, but it is typically considered only viable at lower temperatures, Clean Technica reported. The new study’s findings reveal the potential for solar-trapping devices to generate enough heat to power even some of the most carbon-intensive industry processes.

“Previous research has only managed to demonstrate the thermal-trap effect up to 170°C (338°F),” Casati said in a statement. “Our research showed that solar thermal trapping works not just at low temperatures, but well above 1,000°C. This is crucial to show its potential for real-world industrial applications.”

As reported in the study, heat generation makes up about half of final energy consumption, with 25% of total energy consumption used for industrial processes. Most of this energy consumption for industrial processes relies on power from fossil fuels. By using solar thermal trapping instead to generate high temperatures, industries could reduce their emissions.

“Energy issue is a cornerstone to the survival of our society,” Casati said. “Solar energy is readily available, and the technology is already here. To really motivate industry adoption, we need to demonstrate the economic viability and advantages of this technology at scale.”

The solar-trapping device is currently just a proof-of-concept and is not yet ready to scale. The team will continue their research to make their device more efficient and effective, including through testing different materials that can absorb the solar radiation and generate higher temperatures. They also noted that further testing is needed for different coatings or applied surface patterns to reduce reflections.

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Bumblebee Populations Threatened by Nests Overheating Due to Climate Change

Bumblebees are essential pollinators, but many species are in a downward spiral that is sometimes a mystery to scientists.

In a new study, researchers have found that the increasing temperatures of the human-caused climate crisis may be interfering with climate control in bumblebee nests, threatening future generations.

“The decline in populations and ranges of several species of bumblebees may be explained by issues of overheating of the nests and the brood,” said lead author of the study Dr. Peter Kevan of Canada’s University of Guelph, in a press release from Frontiers. “The constraints on the survival of the bumblebee brood indicate that heat is likely a major factor, with heating of the nest above about 35 degrees Celsius being lethal, despite the remarkable capacity of bumblebees to thermoregulate.”

There are more than 250 species of bumblebee on Earth, inhabiting a variety of environments. Many are in decline due to climate change, but the specific cause has been difficult to pinpoint.

Following a review of the scientific literature, the research team found that the optimal temperature window of bumblebee nests — roughly 28 to 32 degrees Celsius — was consistent between many species around the world.

“We can assume that the similarity reflects the evolutionary relatedness of the various species,” Kevan said in the press release.

The right temperature means minimal metabolic expenditure, while warmth in excess of that window can lead to dangerous heat stress. This means adaptation to higher temperatures could prove hard for bumblebees.

“Excessively high temperatures are more harmful to most animals and plants than cool temperatures. When conditions are cool, organisms that do not metabolically regulate their body temperatures simply slow down, but when temperatures get too high metabolic processes start to break down and cease,” Kevan explained. “Death ensues quickly.”

After a review of 180 years of literature, the team discovered that bumblebees seemed to survive at temperatures as high as 36 degrees Celsius, while 30 to 32 degrees was the optimal range for development, though that window could differ between biogeographical conditions and species.

“The similarity of the optimum temperature range in incubating nests is remarkable, about 28–32°C regardless of species from the cold High Arctic to tropical environments indicates that the optimal temperature for rearing of brood in Bombus spp. is a characteristic common to bumblebees (perhaps a synapomorphy) and with limited evolutionary plasticity,” the researchers wrote in the study.

The researchers said that, while bumblebees have a number of behavioral adaptations for thermoregulation, they may not be adequate to adapt to climate change. They called for more research on how the pollinators can survive the rising temperatures, as well as more studies into bumblebee ecology — temperature, thermoregulation, nest morphology and material properties.

A bumblebee colony acts as a “superorganism,” with reproductive fitness dependent on collective reproduction and survival rather than on individual bees, the press release said. Individual bees may be better able to cope with heat than others, but if the bees’ nest is too hot for raising healthy larvae, the entire colony will suffer.

“The effect of high nest temperatures has not been studied very much, which is surprising. We can surmise that nest temperatures above the mid-30s Celsius would likely be highly detrimental and that above about 35 Celsius death would occur, probably quite quickly,” Kevan said in the press release.

Honeybee studies have shown that hotter nest temperatures sap the strength of queen bees and weaken their ability to reproduce, leading to smaller worker bees and less optimum conditions. If heat affects bumblebees in a similar way, global heating could be a direct cause of their decline.

Some bumblebee colonies may be able to adapt the selection and form of nest site or their behavior to cool down their nests. Ground-penetrating radar might aid in the study of ground-nesting bee species and nest analysis using flow-through respirometry at varying temperatures could help researchers assess how much stress is being placed on bee colonies inside.

“We need both to understand how different colonies cope with the same conditions and how different species cope with different conditions, including whether some bumblebee species have broader thermal neutral zones, affording them more resilience,” the press release said.

“We hope that future scientists may take the ideas we present and apply them to their own research on bumblebee health and conversation,” Kevan concluded.

The study, “Thermodynamics, thermal performance and climate change: temperature regimes for bumblebee (Bombus spp.) colonies as examples of superorganisms,” was published in the journal Frontiers in Bee Science.

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Like Humans, Bumblebees and Chimpanzees Can Pass on Their Skills to Form ‘Cumulative Culture’

Humans and other animals have the ability to teach important skills to their contemporaries that allow for knowledge building across generations.

According to two new studies, bumblebees and chimpanzees are two animals who have the capability of learning skills so complex they would never have been able to master them alone — an ability scientists previously believed was unique to humans.

Culture refers to behaviours that are socially learned and persist within a population over time. Increasing evidence suggests that animal culture can, like human culture, be cumulative: characterized by sequential innovations that build on previous ones,” the bumblebee study said.

Cumulative culture” is the human capacity to build knowledge, skills and technology over time while improving upon them as they are taught to successive generations, reported AFP. It is a technique that is viewed as an essential part of humans’ dominance over their environment.

“Imagine that you dropped some children on a deserted island,” said Lars Chittka, co-author of the study on bees and a behavioral ecologist at London’s Queen Mary University, in a video accompaniment to the study, as AFP reported. “They might — with a bit of luck — survive, but they would never know how to read or to write because this requires learning from previous generations.”

Earlier experiments had shown that some animals demonstrate “social learning,” where they figure out a skill through observation of individuals of their own species. But while some of the behaviors appeared to have been honed over time — such as the ability of chimpanzees to crack open nuts or the navigational skills of homing pigeons — it is hard for scientists to eliminate the possibility that these animals did not figure out how to accomplish the specific tasks on their own.

A research team from the United Kingdom looked at bumblebees to determine whether they had some of the characteristics of cumulative culture.

First they trained a group of “demonstrators” to perform a complicated skill that could be passed on to others.

They gave some of the bees a two-step puzzle box that involved pushing a blue tab followed by a red tab that released a sugary reward.

“This task is really difficult for bees because [during the first step] we are essentially asking them to learn to do something in exchange for nothing,” Alice Bridges, co-author of the study and a Ph.D. student at Queen Mary University, told AFP.

The bees initially attempted to only push the red tab without moving the blue tab first, then gave up.

In order to motivate them, the team placed the sugary prize at the end of the blue tab, then took the reward away gradually as they mastered the task.

The researchers then paired the demonstrator bees with “naive” bees unfamiliar with the process who watched their peers solve the puzzle.

Of the 15 new bees, five quickly solved the puzzle with no prize during the first step. Naive bees who were not taught how to obtain the treat were still not able to open the box after extended exposure for as long as 24 days.

Bridges said the team was “surprised” and thrilled when they saw the swift learning behavior.

They said the study was the first to observe an invertebrate species demonstrating cumulative culture.

“This finding challenges a common opinion in the field: that the capacity to socially learn behaviours that cannot be innovated through individual trial and error is unique to humans,” the study said.

The study, “Bumblebees socially learn behaviour too complex to innovate alone,” was published in the journal Nature.

The second study showed that humans’ closest living relatives — chimpanzees — also have the ability to learn from their contemporaries.

The Dutch-led research team set up a puzzle box to be solved by a semi-wild chimpanzee troupe at Zambia’s Chimfunshi Wildlife Orphanage.

The task involved first retrieving a wooden ball, then holding a drawer open, putting the ball in and closing it to get a peanut at the end.

During the course of three months, 66 chimpanzees attempted but were not able to solve the puzzle.

The team then trained two demonstrator chimpanzees who showed their peers how to do it.

Within two months, 14 of the naive chimpanzees had mastered the puzzle. What’s more, the researchers discovered that the more often they observed the demonstrators, the faster they were able to solve it.

The study, “Chimpanzees use social information to acquire a skill they fail to innovate,” was published in the journal Nature Human Behavior.

Bridges said both studies “can’t help but fundamentally challenge the idea that cumulative culture is this extremely complex, rare ability that only the very ‘smartest’ species — e.g. humans — are capable of.”

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Summer 2023 Was Hottest Summer in the Northern Hemisphere in 2,000 Years, Study Finds

After studying tree rings from the past 2,000 years, researchers have found that the Northern Hemisphere experienced its hottest summer in 2023 in the past two millennia.

The researchers used both observed and modeled surface air temperatures for the period from June to August each year, along with 2,000 years of tree ring data. Their results, published in the journal Nature, showed that summer 2023 in the Northern Hemisphere was the hottest since the height of the Roman Empire.

“When you look at the long sweep of history, you can see just how dramatic recent global warming is,” Ulf Büntgen, co-author of the study and professor at University of Cambridge’s Department of Geography, said in a statement. “2023 was an exceptionally hot year, and this trend will continue unless we reduce greenhouse gas emissions dramatically.”

Additionally, the findings revealed that the Northern Hemisphere has already surpassed the 1.5-degree-Celsius limit outlined in the Paris Agreement, a target meant to curb global warming and prevent the worst impacts of climate change.

In September 2023, the European Union’s Copernicus Climate Change Service (C3S) found that the period from June through August 2023 was the hottest summer on record. Further, C3S predicted in December of last year that 2023 would be named the warmest year on record.

As the researchers of the new study pointed out, records are often limited either by location or by date, with instrumental evidence of warming typically dating back to about 1850 or later. The older recorded data can also be inconsistent.

Tree rings helped fill gaps of knowledge and provide more accurate measurements of historic summer temperatures, and the study confirmed the record-breaking summer heat.

The researchers linked many of the warmer summers in the tree ring data to El Niño events, but they noted that rising emissions and global warming have led to stronger El Niño events, like the one experienced in 2023. 

“It’s true that the climate is always changing, but the warming in 2023, caused by greenhouse gases, is additionally amplified by El Niño conditions, so we end up with longer and more severe heat waves and extended periods of drought,” said Jan Esper, lead author of the study and professor at the Johannes Gutenberg University Mainz in Germany. “When you look at the big picture, it shows just how urgent it is that we reduce greenhouse gas emissions immediately.”

The study authors reported that El Niño could bring record-breaking temperatures in the early summer this year, although forecasters at the National Oceanic and Atmospheric Administration (NOAA) have found evidence of a weakening El Niño last month. NOAA officials have also predicted a 69% of a La Niña event by July to September. 

A La Niña event, which could last from summer through early winter or longer, could bring other detrimental climate impacts. This climate event could bring frequent tropical storms and hurricanes to the eastern U.S., PBS reported, along with increased risks for drought and wildfires in the southwestern U.S.

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After Decades of Disinformation, the US Finally Begins Regulating PFAS Chemicals

By: Derrick Z. Jackson

Earlier this month, the Environmental Protection Agency announced it would regulate two forms of PFAS contamination under Superfund laws reserved for “the nation’s worst hazardous waste sites.” EPA Administrator Michael Regan said the action will ensure that “polluters pay for the costs to clean up pollution threatening the health of communities.”

That was an encore to the Food and Drug Administration announcing in February that companies will phase out food packaging with PFAS wrappings and the mid-April announcement by Regan that the EPA was establishing the first-ever federal limits on PFAS in drinking water. At that time, he declared, “We are one huge step closer to finally shutting off the tap on forever chemicals once and for all.”

One can forever hope the tap will be eventually shut, since it took seemingly forever for the nation to begin to crack down on this class of per-and polyfluoroalkyl synthetic chemicals. The chemical bonds of PFAS, among the strongest ever created, resulted in an incredible ability to resist heat, moisture, grease and stains. PFAS chemicals seemed like miracle substances in the 20th-century quest for convenience. They became ubiquitous in household furnishings, cookware, cosmetics, and fast-food packaging, and a key component of many firefighting foams.

The bonds are so indestructible they would impress Superman. They don’t break down in the environment for thousands of years, hence the “forever” nickname. Unfortunately for humans, the same properties represent Kryptonite.  

Today, the group of chemicals known as PFAS is the source of one of the greatest contaminations of drinking water in the nation’s history. Flowing from industrial sites, landfills, military bases, airports, and wastewater treatment discharges, PFAS chemicals, according to the United States Geological Survey, are detectable in nearly half our tap water. Other studies suggest that a majority of the US population drinks water containing PFAS chemicals—as many as 200 million people, according to a 2020 peer-reviewed study conducted by the Environmental Working Group.

PFAS Chemicals Are Everywhere

No one escapes PFAS chemicals. They make it into the kitchen or onto the dining room table in the form of non-stick cookware, microwave popcorn bags, fast-food burger wrappers, candy wrappers, beverage cups, take-out containers, pastry bags, French-fry and pizza boxes. They reside throughout homes in carpeting, upholstery, paints, and solvents.

They are draped on our bodies in “moisture-wicking” gym tights, hiking gear, yoga pants, sports bras, and rain and winter jackets. They are on our feet in waterproof shoes and boots. Children have PFAS in baby bedding and school uniforms. Athletes of all ages play on PFAS on artificial turf. PFAS chemicals are on our skin and gums through eye, lip, face cosmetics, and dental floss. Firefighters have it in their protective clothing.

As a result, nearly everyone in the United States has detectable levels of PFAS in their bodies. There is no known safe level of human exposure to these chemicals. They are linked to multiple cancers, decreased fertility in women, developmental delays in children, high cholesterol, and damage to the cardiovascular and immune systems. A 2022 study by researchers from Harvard Medical School and Sichuan University in China estimated that exposure to one form of PFAS (PFOS, for perfluorooctane sulfonic acid), may have played a role in the deaths of more than 6 million people in the United States between 1999 and 2018.

As sweeping as PFAS contamination is, exposures in the United States are also marked by clear patterns of environmental injustice and a betrayal to military families. An analysis by the Union of Concerned Scientists found that people of color and low-income people were more likely to live near non-military sources of PFAS contamination than wealthier, white people.

Another study by UCS found that 118 of 131 military bases had PFAS contamination concentrations at least 10 times higher than federal risk levels. A federal study last year found a higher risk of testicular cancer for Air Force servicemen engaged in firefighting with PFAS foams.

Tobacco-Lke Disinformation

In the end, the whole nation was betrayed, in a manner straight out of the tobacco disinformation playbook. Behind the image of convenience, manufacturers long knew that PFAS chemicals were toxic. Internal documents uncovered over the years show how DuPont and 3M, the two biggest legacy makers of PFAS, knew back in the 1960s that the compounds built up in blood and enlarged the livers of laboratory animals. By 1970, a DuPont document referring to a PFAS chemical under its famed “Teflon” trademark said that it “is highly toxic when inhaled and moderately toxic when injected.”

By the late 1970s, DuPont was discovering that PFAS chemicals were affecting the liver of workers and that plant employees were having myocardial infarctions at levels “somewhat higher than expected.” But that did not stop the industry from downplaying the risk to workers.

One internal 3M document in 1980 claimed that PFAS chemicals have “a lower toxicity like table salt.” Yet, a study last year of documents by researchers at the University of California San Francisco and the University of Colorado found that DuPont, internally tracking the outcome of worker pregnancies in 1980 and 1981, recorded two cases of birth defects in infants. Yet, in 1981, in what the researchers determined was a “joint” communication to employees of DuPont and 3M, the companies claimed: “We know of no evidence of birth defects” at DuPont and were “not knowledgeable about the pregnancy outcome” of employees at 3M who were exposed to PFAS.  

The same suppression and disinformation kept government regulators at bay for decades. The San Francisco and Colorado researchers found internal DuPont documents from 1961 to 1994 showing toxicity in animal and occupational studies that were never reported to the EPA under the Toxic Substances Control Act. As one example, DuPont, according to a 2022 feature by Politico’s Energy and Environment News, successfully negotiated in the 1960s with the Food and Drug Administration to keep lower levels of PFAS-laden food wrapping and containers on the market despite evidence of enlarged livers in laboratory rats.

A Patchwork Response

Eventually, the deception and lies exploded in the face of the companies, as independent scientists found more and more dire connections to PFAS in drinking water and human health and lawsuits piled up in the courts. Last year, 3M agreed to a settlement of between $10.5 billion and $12.5 billion for PFAS contamination in water systems around the nation. DuPont and other companies agreed to another $1.2 billion in settlements. That’s not nothing, but it is a relatively small price to pay for two industrial behemoths that have been among the Fortune 500 every year since 1955.

In the last two decades, the continuing science on PFAS chemicals and growing public concern has led to a patchwork of individual apparel and food companies to say they will stop using PFAS in clothes and wrapping. Some states have enacted their own drinking water limits and are moving forward with legislation to restrict or ban products containing PFAS. In 2006, the EPA began a voluntary program in which the leading PFAS manufacturers in the United States agreed to stop manufacturing PFOA, one of the most concerning forms of PFAS.

But companies had a leisurely decade to meet commitments. Even as companies negotiated, a DuPont document assumed coziness with the EPA. “We need the EPA to quickly (like first thing tomorrow) say the following: Consumer products sold under the Teflon brand are safe. . .there are no human health effects to be caused by PFOA [a chemical in the PFAS family].”

Two years ago, 3M announced it will end the manufacture of PFAS chemicals and discontinue their application across its portfolio by the end of next year. But the company did so with an insulting straight face, saying on its products are “safe and effective for their intended uses in everyday life.”

EPA Action Finally, but More Is Needed

The nation can no longer accept the overall patchwork or industry weaning itself off PFAS at its own pace. The EPA currently plans to issue drinking water limits for six forms of PFAS and place two forms under Superfund jurisdiction. The Superfund designation gives the government its strongest powers to enforce cleanups that would be paid for by polluters instead of taxpayers.”

But there are 15,000 PFAS compounds, according to the National Institute of Environmental Health Sciences. There is nothing to stop companies from trying to play around with other compounds that could also prove harmful. Cleaning up the PFAS chemicals that have already been allowed will take billions of dollars and water utilities around the country are already screaming, with some justification, that the federal government needs to provide more money than it is offering. And even the Superfund designation does not actually ban their use.

It would be better if the United States were to follow the lead of the European Union which is now considering a ban or major restrictions on the whole class of chemicals, fearing that “without taking action, their concentrations will continue to increase, and their toxic and polluting effects will be difficult to reverse.”

The effects are scary to quantify. Regan said in his drinking water announcement that the new rules would improve water quality for 100 million people and “prevent thousands of deaths and reduce tens of thousands of serious illnesses across the country.” A draft EPA economic analysis last year predicted that tight standards could save more than 7,300 lives alone from bladder cancer, kidney cancer and cardiovascular diseases, and avoid another 27,000 non-fatal cases of those diseases.

That makes it high time that the federal government borrow from DuPont’s arrogant assumption that it could push around the EPA. We need the EPA to quickly (like first thing tomorrow) say the following: “Consumer products with PFAS are not safe and are causing unacceptable environmental consequences. We are shutting off the tap on ALL of them.”

Derrick Z. Jackson is a UCS Fellow in climate and energy and the Center for Science and Democracy. Formerly of the Boston Globe and Newsday, Jackson is a Pulitzer Prize and National Headliners finalist, a 2021 Scripps Howard opinion winner, and a respective 11-time, 4-time and 2-time winner from the National Association of Black Journalists, the National Society of Newspaper Columnists, and the Education Writers Association.

Reposted with permission from The Union of Concerned Scientists.

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