The Biden administration on Tuesday laid out for the first time [PDF] a set of broad government guidelines around the use of carbon offsets in an attempt to shore up confidence in a method for tackling global warming that has faced growing criticism. From a report: Companies and individuals spent $1.7 billion last year voluntarily buying carbon offsets, which are intended to cancel out the climate effects of activities like air travel by funding projects elsewhere, such as the planting of trees, that remove carbon dioxide from the atmosphere, but that wouldn't have happened without the extra money.

Yet a growing number of studies and reports have found that many carbon offsets simply don't work. Some offsets help fund wind or solar projects that likely would have been built anyway. And it's often extremely difficult to measure the effectiveness of offsets intended to protect forests. As a result, some scientists and researchers have argued that carbon offsets are irredeemably flawed and should be abandoned altogether. Instead, they say, companies should just focus on directly cutting their own emissions.

The Biden administration is now weighing in on this debate, saying that offsets can sometimes be an important tool for helping businesses and others reduce their emissions, as long as there are guardrails in place. The new federal guidelines are an attempt to define "high-integrity" offsets as those that deliver real and quantifiable emissions reductions that wouldn't have otherwise taken place. [...] The new federal guidelines also urge businesses to focus first on reducing emissions within their own supply chains as much as possible before buying carbon offsets. Some companies have complained that it is too difficult to control their sprawling network of outside suppliers and that they should be allowed to use carbon offsets to tackle pollution associated with, for instance, the cement or steel they use.

Witnessing the blood-red fires of a volcanic eruption on Earth is memorable. But to see molten rock bleed out of a volcano on a different planet would be extraordinary. That is close to what scientists have spotted on Venus: two vast, sinuous lava flows oozing from two different corners of Earth's planetary neighbor. From a report: "After you see something like this, the first reaction is 'wow,'" said Davide Sulcanese, a doctoral student at the Universita d'Annunzio in Pescara, Italy, and an author of a study reporting the discovery in the journal Nature Astronomy, published on Monday. Earth and Venus were forged at the same time. Both are made of the same primeval matter, and both are the same age and size. So why is Earth a paradise overflowing with water and life, while Venus is a scorched hellscape with acidic skies?

Volcanic eruptions tinker with planetary atmospheres. One theory holds that, eons ago, several apocalyptic eruptions set off a runaway greenhouse effect on Venus, turning it from a temperate, waterlogged world into an arid desert of burned glass. To better understand its volcanism, scientists hoped to catch a Venusian eruption in the act. But although the planet is known to be smothered in volcanoes, an opaque atmosphere has prevented anyone from seeing an eruption the way spacecraft have spotted them on Io, the hypervolcanic moon of Jupiter. In the 1990s, NASA's spacecraft Magellan used cloud-penetrating radar to survey most of the planet. But back then, the relatively low-resolution images made spotting fresh molten rock a troublesome task.

Retailers are being urged to stop making everyday products such as drinks bottles, outdoor furniture and toys out of brightly coloured plastic after researchers found it degrades into microplastics faster than plainer colours. From a report: Red, blue and green plastic became "very brittle and fragmented," while black, white and silver samples were "largely unaffected" over a three-year period, according to the findings of the University of Leicester-led project. The scale of environmental pollution caused by plastic waste means that microplastics, or tiny plastic particles, are everywhere. Indeed, they were recently found in human testicles, with scientists suggesting a possible link to declining sperm counts in men.

In this case, scientists from the UK and the University of Cape Town in South Africa used complementary studies to show that plastics of the same composition degrade at different rates depending on the colour. The UK researchers put bottle lids of various colours on the roof of a university building to be exposed to the sun and the elements for three years. The South African study used plastic items found on a remote beach. "It's amazing that samples left to weather on a rooftop in Leicester and those collected on a windswept beach at the southern tip of the African continent show similar results," said Dr Sarah Key, who led the project. "What the experiments showed is that even in a relatively cool and cloudy environment for only three years, huge differences can be seen in the formation of microplastics." This field study, published in the journal Environmental Pollution, is the first such proof of this effect. It suggests that retailers and manufacturers should give more consideration to the colour of short-lived plastics.

Millions of Americans face the threat of dangerous heatwaves in the coming weeks with another summer of record-breaking temperatures forecast to hit the US. From a report: Most of New Mexico and Utah -- alongside parts of Arizona, Texas and Colorado -- have the highest chance (60% to 70%) of seeing hotter-than-average summer temperatures, according to the National Oceanic and Atmospheric Administration (Noaa). In addition, the entire north-east -- from Maine down to Pennsylvania and New Jersey -- as well as a large stretch from Louisiana to Arizona, Washington and Idaho, have a 40% to 50% chance of experiencing above-average temperatures from June through August. Only south-west Alaska is expected to have below-normal temperatures.

"We can expect another dangerous hot summer season, with daily records already being broken in parts of Texas and Florida," said Kristy Dahl, principal climate scientist for the Climate and Energy program at the Union of Concerned Scientists. "As we warm the planet, we are going to see climate disasters pile up and compound against each other because of the lack of resilience in our infrastructure and government systems." Texas has already been hit with a series of tornadoes, unprecedented floods and record-breaking temperatures. Earlier in May, temperatures spiked as hundreds of thousands of households around Houston were left without power after a destructive storm killed at least seven people and damaged transmission towers and power lines.

"Concrete and steel production are major sources of CO2 emissions," writes New Atlas, "but a new solution from Cambridge could recycle both at the same time." Throwing old concrete into steel-processing furnaces not only purifies iron but produces "reactivated cement" as a byproduct. If done using renewable energy, the process could make for completely carbon-zero cement.

Concrete is the world's most used building material, and making it is a particularly dirty business — concrete production alone is responsible for about 8% of total global CO2 emissions. Unfortunately it's not easy to recycle back into a form that can be used to make new concrete structures... For the new study, Cambridge researchers investigated how waste concrete could be converted back into clinker, the dry component of cement, ready to be used again. "I had a vague idea from previous work that if it were possible to crush old concrete, taking out the sand and stones, heating the cement would remove the water, and then it would form clinker again," said Dr. Cyrille Dunant, first author of the study...

An electric arc furnace needs a "flux" material, usually lime, to purify the steel. This molten rocky substance captures the impurities, then bubbles to the surface and forms a protective layer that prevents the new pure steel from becoming exposed to air. At the end of the process, the used flux is discarded as a waste material. So for the Cambridge method, the lime flux was swapped out for the recycled cement paste. And sure enough, not only was it able to purify the steel just fine, but if the leftover slag is cooled quickly in air, it becomes new Portland cement.

The resulting concrete has similar performance to the original stuff. Importantly, the team says this technique doesn't add major costs to either concrete or steel production, and significantly reduces CO2 emissions compared to the usual methods of making both. If the electric arc furnace was powered by renewable sources, it could essentially make for zero-emission cement.
"The first industrial-scale trials are underway this month," the article adds. "Producing zero emissions cement is an absolute miracle, but we've also got to reduce the amount of cement and concrete we use," said Professor Julian Allwood, who led the research.

And the professor has also recorded a thoughtful video visualizing the process — and explaining the significance of their breakthrough.

Scientists report that Greater Spotted Eagles altered their migration routes across Ukraine to avoid conflict and habitat destruction caused by the war. The BBC reports: The scientists studied GPS data from tagged birds in the months after the February 2022 invasion, a time of heavy fighting in northern Ukraine as Russia tried to take Kyiv by sending troops south from Belarus. The researchers from the Estonian University of Life Sciences and the British Trust for Ornithology reported their findings in the journal Current Biology. "The war in Ukraine has had a devastating impact on people and the environment. Our findings provide a rare window into how conflicts affect wildlife," said lead author Charlie Russell, a postgraduate researcher at the University of East Anglia.

Classified as a vulnerable species, the Greater Spotted Eagle is a large, brownish-colored bird of prey. Researchers started following them using GPS tracking devices in 2017 but didn't expect to be monitoring them through an active conflict zone five years later. The findings reveal they made large deviations from their previously tracked routes. They also spent less time stopping at their usual refueling sites in Ukraine or avoided them entirely. As a result, they traveled farther, about an extra 52 miles (85km) on average.

For migrating birds, stopover sites are essential places to get food, water, and shelter. These changes delayed the birds' arrival at the breeding grounds and likely made them use more energy, to damaging effect. "No doubt about it. I think the take-home story is that the conflict in Ukraine is fundamentally disrupting the migratory ecology of this species," said Dr Jim Reynolds, Assistant Professor in Ornithology and Animal Conservation at the University of Birmingham, who was independent from the study. "For a vulnerable species like this, anything that disrupts breeding performance is a major problem. As a conservation biologist, you worry about that in a massive way." Despite all the tagged birds surviving, researchers believe their experience may have affected their ability to breed.

Countries around the globe have failed to reach consensus on the terms of a treaty that would unify the world in a strategy against the inevitable next pandemic, trumping the nationalist ethos that emerged during Covid-19. From a report: The deliberations, which were scheduled to be a central item at the weeklong meeting of the World Health Assembly beginning Monday in Geneva, aimed to correct the inequities in access to vaccines and treatments between wealthier nations and poorer ones that became glaringly apparent during the Covid pandemic. Although much of the urgency around Covid has faded since the treaty negotiations began two years ago, public health experts are still acutely aware of the pandemic potential of emerging pathogens, familiar threats like bird flu and mpox, and once-vanquished diseases like smallpox.

"Those of us in public health recognize that another pandemic really could be around the corner," said Loyce Pace, an assistant secretary at the Department of Health and Human Services, who oversees the negotiations in her role as the United States liaison to the World Health Organization. Negotiators had hoped to adopt the treaty next week. But canceled meetings and fractious debates -- sometimes over a single word -- stalled agreement on key sections, including equitable access to vaccines. The negotiating body plans to ask for more time to continue the discussions.

The seemingly "never-ending" rain last autumn and winter in the UK and Ireland was made 10 times more likely and 20% wetter by human-caused global heating, a study has found. From a report: More than a dozen storms battered the region in quick succession between October and March, which was the second-wettest such period in nearly two centuries of records. The downpour led to severe floods, at least 20 deaths, severe damage to homes and infrastructure, power blackouts, travel cancellations, and heavy losses of crops and livestock.

The level of rain caused by the storms would have occurred just once in 50 years without the climate crisis, but is now expected every five years owing to 1.2C of global heating reached in recent years. If fossil fuel burning is not rapidly cut and the global temperature reaches 2C in the next decade or two, such severe wet weather would occur every three years on average, the analysis showed. [...] The analysis, conducted by climate scientists working as part of the World Weather Attribution group, compared how likely and how intense the wet winter was in today's heated world with how likely it would have been in a world without high levels of carbon emissions. Warmer air can hold more water vapour and therefore produce more rain. Hundreds of "attribution studies" have shown how global heating is already supercharging extreme weather such as heatwaves, wildfires, droughts and storms across the world.

The United States has assessed that Russia launched what is likely a counter space weapon last week that's now in the same orbit as a U.S. government satellite, Pentagon spokesman Maj. Gen. Pat Ryder confirmed Tuesday. From a report: "What I'm tracking here is on May 16, as you highlighted, Russia launched a satellite into low Earth orbit that we that we assess is likely a counter space weapon presumably capable of attacking other satellites in low Earth orbit," Ryder said when questioned by ABC News about the information, which was made public earlier Tuesday by Robert Wood, deputy U.S. ambassador to the United Nations.

"Russia deployed this new counter space weapon into the same orbit as a U.S. government satellite," Ryder continued. "And so assessments further indicate characteristics resembling previously deployed counter space payloads from 2019 and 2022." Ryder added: "Obviously, that's something that we'll continue to monitor. Certainly, we would say that we have a responsibility to be ready to protect and defend the space domain and ensure continuous and uninterrupted support to the joint and combined force. And we'll continue to balance the need to protect our interests in space with our desire to preserve a stable and sustainable space environment." When asked if the Russian counter space weapon posed a threat to the U.S. satellite, Ryder responded: "Well, it's a counter space weapon in the same orbit as a U.S. government satellite."

Major oil companies have in recent years made splashy climate pledges to cut their greenhouse gas emissions and take on the climate crisis, but a new report suggests those plans do not stand up to scrutiny. From a report: The research and advocacy group Oil Change International examined climate plans from the eight largest US- and European-based international oil and gas producers -- BP, Chevron, ConocoPhillips, Eni, Equinor, ExxonMobil, Shell and TotalEnergies -- and found none were compatible with limiting global warming to 1.5C above pre-industrial levels -- a threshold scientists have long warned could have dire consequences if breached.

"There is no evidence that big oil and gas companies are acting seriously to be part of the energy transition," David Tong, global industry campaign manager at Oil Change International, who co-authored the analysis, said in a statement. The report's authors used 10 criteria and ranked each aspect of each companyâ(TM)s plan on a spectrum from "fully aligned" to "grossly insufficient" and found all eight companies ranked "grossly insufficient" or "insufficient" on nearly all criteria. The US firms Chevron, ConocoPhillips and ExxonMobil each ranked "grossly insufficient" on all 10 criteria. "American fossil-fuel corporations are the worst of the worst," Allie Rosenbluth, US program manager at Oil Change International, said in a statement.

Alphabet's moonshot factory, X, is scaling back its ambitious projects amid concerns over Google's core search business facing competition from AI chatbots like ChatGPT. The lab, once a symbol of Google's commitment to innovation, is now spinning off projects as startups rather than integrating them into Alphabet. The shift reflects a broader trend among tech giants, who are cutting costs and focusing on their core businesses in response to the rapidly evolving AI landscape.

Recent research led by the University of California, Irvine has discovered warm, high-pressure seawater causing significant melting under the Thwaites Glacier in Antarctica. "There are places where the water is almost at the pressure of the overlying ice, so just a little more pressure is needed to push up the ice," said lead author Eric Rignot, UC Irvine professor of Earth system science. "The water is then squeezed enough to jack up a column of more than half a mile of ice." Interesting Engineering reports: A team of glaciologists led by researchers at the University of California, Irvine employed high-resolution satellite radar data to uncover evidence of the warm, high-pressure seawater intrusion beneath the glacier. A statement by the scientists noted that the widespread contact between ocean water and the glacier -- a process replicated throughout Antarctica and in Greenland -- causes "vigorous melting" and may require a reassessment of global sea level rise projections.

In a bid to comprehend the impact of ocean-water interaction on glacial melting, glaciologists examined data collected between March 2023 and June 2023 sourced from Finland's ICEYE commercial satellite mission. These satellites represent a collection that resembles constellations in polar orbit around the planet. They employ InSAR -- interferometric synthetic aperture radar -- to continuously track changes on the Earth's surface. "When we have a continuous time series and compare that with the tidal cycle, we see the seawater coming in at high tide and receding and sometimes going farther up underneath the glacier and getting trapped," said Rignot. "Thanks to ICEYE, we're beginning to witness this tidal dynamic for the first time."

He explained that seawater entering the base of the ice sheet, along with freshwater from geothermal heat and friction, accumulates and needs to flow. This water moves through natural channels or pools in cavities, creating pressure that lifts the ice sheet. Co-author Christine Dow, professor in the Faculty of Environment at the University of Waterloo in Ontario, Canada alluding to the glacier in question said that the Thwaites is the most unstable place in the Antarctic and contains the equivalent of 60 centimeters of sea level rise. The worry is that we are underestimating the speed at which the glacier is changing, which would be devastating for coastal communities around the world. "At the moment we don't have enough information to say one way or the other how much time there is before the oceanwater intrusion is irreversible, says Dow. The study was published in the journal Proceedings of the National Academy of Sciences.

"Blue Origin's tourism rocket has launched passengers to the edge of space for the first time in nearly two years," reports CNN, "ending a hiatus prompted by a failed uncrewed test flight." The New Shepard rocket and capsule lifted off at 9:36 a.m. CT (10:36 a.m. ET) from Blue Origin's facilities on a private ranch in West Texas.

NS-25, Blue Origin's seventh crewed flight to date, carried six customers aboard the capsule: venture capitalist Mason Angel; Sylvain Chiron, founder of the French craft brewery Brasserie Mont-Blanc; software engineer and entrepreneur Kenneth L. Hess; retired accountant Carol Schaller; aviator Gopi Thotakura; and Ed Dwight, a retired US Air Force captain selected by President John F. Kennedy in 1961 to be the nation's first Black astronaut candidate... Dwight completed that challenge and reached the edge of space at the age of 90, making him the oldest person to venture to such heights, according to a spokesperson from Blue Origin...

"It's a life-changing experience," he said. "Everybody needs to do this."

The rocket booster landed safely a couple minutes prior to the capsule. During the mission, the crew soared to more than three times the speed of sound, or more than 2,000 miles per hour. The rocket vaulted the capsule past the Kármán line, an area 62 miles (100 kilometers) above Earth's surface that is widely recognized as the altitude at which outer space begins...
"And at the peak of the flight, passengers experienced a few minutes of weightlessness and striking views of Earth through the cabin windows."

The thinktank InfluenceMap produces "data-driven analysis on how business and finance are impacting the climate crisis." Their web site says their newest report documents "How automaker lobbying threatens the global transition to electric vehicles." This report analyses the climate policy engagement strategies of fifteen of the largest global automakers in seven key regions (Australia, EU, Japan, India, South Korea, UK, US). It shows how even in countries where major climate legislation has recently passed, such as the US and Australia, the ambition of these policies has been weakened due to industry pressure. All fifteen automakers, except Tesla, have actively advocated against at least one policy promoting electric vehicles. Ten of the fifteen showed a particularly high intensity of negative engagement and scored a final grade of D or D+ by InfluenceMap's methodology. Toyota is the lowest-scoring company in this analysis, driving opposition to climate regulations promoting battery electric vehicles in multiple regions, including the US, Australia and UK. Of all automakers analyzed, only Tesla (scoring B) is found to have positive climate advocacy aligned with science-based policy.
CleanTechnica writes that Toyota "led on hybrid vehicles (and still does), so it's actually not surprising that it has been opposed to the next stage of climate-cutting auto evolution — it's clinging on to its lead rather than continuing to innovate for a new era."

More from InfluenceMap: Only three of fifteen companies — Tesla, Mercedes Benz and BMW — are forecast to produce enough electric vehicles by 2030 to meet the International Energy Agency's updated 1.5 degreesC pathway of 66% electric vehicle (battery electric, fuel cell and plug-in hybrids) sales according to InfluenceMap's independent analysis of industry-standard data from February 2024. Current industry forecasts analyzed for this report show automaker production will reach only 53% electric vehicles in 2030. Transport is the third-largest source of greenhouse gas emissions globally, and road transport is failing to decarbonize at anywhere near the rate of many other industries. InfluenceMap's report also finds that Japanese automakers are the least prepared for an electric vehicle transition and are engaging the hardest against it.
"InfluenceMap highlights that these anti-EV efforts in the industry are often coming from industry associations rather than coming directly from automakers, shielding them a bit from inevitable public backlash," writes CleanTechnica.

"Every automaker included in the study except Tesla remains a member of at least two of these groups," InfluenceMap reports, "with most automakers a member of at least five."

Thanks to Slashdot reader Baron_Yam for sharing the news.

The Washington Post reports that America took "one of its biggest steps yet to keep fossil fuels in the ground," announcing Thursday that it will end new coal leasing in the Powder River Basin, "which produces nearly half the coal in the United States...

"It could prevent billions of tons of coal from being extracted from more than 13 million acres across Montana and Wyoming, with major implications for U.S. climate goals." A significant share of the nation's fossil fuels come from federal lands and waters. The extraction and combustion of these fuels accounted for nearly a quarter of U.S. carbon dioxide emissions between 2005 and 2014, according to a study by the U.S. Geological Survey. In a final environmental impact statement released Thursday, Interior's Bureau of Land Management found that continued coal leasing in the Powder River Basin would harm the climate and public health. The bureau determined that no future coal leasing should happen in the basin, and it estimated that coal mining in the Wyoming portion of the region would end by 2041.

Last year, the Powder River Basin generated 251.9 million tons of coal, accounting for nearly 44 percent of all coal produced in the United States. Under the bureau's determination, the 14 active coal mines in the Powder River Basin can continue operating on lands they have leased, but they cannot expand onto other public lands in the region... "This means that billions of tons of coal won't be burned, compared to business as usual," said Shiloh Hernandez, a senior attorney at the environmental law firm Earthjustice. "It's good news, and it's really the only defensible decision the BLM could have made, given the current climate crisis...."

The United States is moving away from coal, which has struggled to compete economically with cheaper gas and renewable energy. U.S. coal output tumbled 36 percent from 2015 to 2023, according to the Energy Information Administration. The Sierra Club's Beyond Coal campaign estimates that 382 coal-fired power plants have closed down or proposed to retire, with 148 remaining. In addition, the Environmental Protection Agency finalized an ambitious set of rules in April aimed at slashing air pollution, water pollution and planet-warming emissions spewing from the nation's power plants. One of the most significant rules will push all existing coal plants by 2039 to either close or capture 90 percent of their carbon dioxide emissions at the smokestack.

"The nation's electricity generation needs are being met increasingly by wind, solar and natural gas," said Tom Sanzillo, director of financial analysis at the Institute for Energy Economics and Financial Analysis, an energy think tank. "The nation doesn't need any increase in the amount of coal under lease out of the Powder River Basin."

"Albert Einstein was right," reports CNN. "There is an area at the edge of black holes where matter can no longer stay in orbit and instead falls in, as predicted by his theory of gravity."

The proof came by combining NASA's earth-orbiting NuSTAR telescope with the NICER telescope on the International Space Station to detect X-rays: A team of astronomers has for the first time observed this area — called the "plunging region" — in a black hole about 10,000 light-years from Earth. "We've been ignoring this region, because we didn't have the data," said research scientist Andrew Mummery, lead author of the study published Thursday in the journal Monthly Notices of the Royal Astronomical Society. "But now that we do, we couldn't explain it any other way."
Mummery — also a Fellow in Oxford's physics department — told CNN, "We went out searching for this one specifically — that was always the plan. We've argued about whether we'd ever be able to find it for a really long time. People said it would be impossible, so confirming it's there is really exciting."

Mummery described the plunging region as "like the edge of a waterfall." Unlike the event horizon, which is closer to the center of the black hole and doesn't let anything escape, including light and radiation, in the "plunging region" light can still escape, but matter is doomed by the powerful gravitational pull, Mummery explained. The study's findings could help astronomers better understand the formation and evolution of black holes. "We can really learn about them by studying this region, because it's right at the edge, so it gives us the most information," Mummery said...

According to Christopher Reynolds, a professor of astronomy at the University of Maryland, College Park, finding actual evidence for the "plunging region" is an important step that will let scientists significantly refine models for how matter behaves around a black hole. "For example, it can be used to measure the rotation rate of the black hole," said Reynolds, who was not involved in the study.

Michael Kan reports via PCMag: AT&T has struck a deal to bring satellite internet connectivity to phones through AST SpaceMobile, a potential rival to SpaceX's Starlink. AT&T says the commercial agreement will last until 2030. The goal is "to provide a space-based broadband network to everyday cell phones," a spokesperson tells PCMag, meaning customers can receive a cellular signal in remote areas where traditional cell towers are few and far between. All they'll need to do is ensure their phone has a clear view of the sky.

AT&T has been working with Texas-based AST SpaceMobile since 2018 on the technology, which involves using satellites in space as orbiting cell towers. In January, AT&T was one of several companies (including Google) to invest $110 million in AST. In addition, the carrier created a commercial starring actor Ben Stiller to showcase AST's technology. In today's announcement, AT&T notes that "previously, the companies were working together under a Memorandum of Understanding," which is usually nonbinding. Hence, the new commercial deal suggests AT&T is confident AST can deliver fast and reliable satellite internet service to consumer smartphones -- even though it hasn't launched a production satellite.

AST has only launched one prototype satellite; in tests last year, it delivered download rates at 14Mbps and powered a 5G voice call. Following a supply chain-related delay, the company is now preparing to launch its first batch of "BlueBird" production satellites later this year, possibly in Q3. In Wednesday's announcement, AT&T adds: "This summer, AST SpaceMobile plans to deliver its first commercial satellites to Cape Canaveral for launch into low Earth orbit. These initial five satellites will help enable commercial service that was previously demonstrated with several key milestones." Still, AST needs to launch 45 to 60 BlueBird satellites before it can offer continuous coverage in the U.S., although in an earnings call, the company said it'll still be able to offer "non-continuous coverage" across 5,600 cells in the country.

Last month, researchers from the University of Washington started conducting an experiment on a decommissioned naval ship in Alameda to test if spraying salt water into the air could brighten clouds and cool the planet. However, their project was forced to stop this month after the city got word of what was going on. SFGate reports: According to a city press release, scientists were ordered to halt the experiment because it violated Alameda's lease with the USS Hornet, the aircraft carrier from which researchers were spraying saltwater into the air using "a machine resembling a snowmaker." The news was first reported by the Alameda Post. "City staff are working with a team of biological and hazardous materials consultants to independently evaluate the health and environmental safety of this particular experiment," the press release states. Specifically, chemicals present in the experiment's aerosol spray are being evaluated to study whether or not they pose any threats to humans, animals or the environment. So far, there isn't any evidence that they do, the city stated.

The prospect of a city-conducted review was not unexpected, the University of Washington said in a statement shared with SFGATE. "In fact, the CAARE (Coastal Aerosol Research and Engagement) facility is designed to help regulators, community members and others engage with the research closely, and we consider the current interactions with the city to be an integral part of that process," the statement reads. "We are happy to support their review and it has been a highly constructive process so far." The marine cloud brightening (MCB) technique involves spraying fine particles of sea salt into the atmosphere from ships or specialized machines. These sea salt particles are chosen because they are a natural source of cloud-forming aerosols and can increase the number of cloud droplets, making the clouds more reflective. The particles sprayed are extremely small, about 1/1000th the width of a human hair, ensuring they remain suspended in the air and interact with cloud droplets effectively.

By reflecting more sunlight, these brightened clouds can reduce the amount of solar energy reaching the Earth's surface, leading to localized cooling. If implemented on a large scale, this cooling effect could potentially offset some of the warming caused by greenhouse gases.

You can learn more about the experiment here.

An anonymous reader quotes a report from Ars Technica: Starting in June of last year, global temperatures went from very hot to extreme. Every single month since June, the globe has experienced the hottest temperatures for that month on record -- that's 11 months in a row now, enough to ensure that 2023 was the hottest year on record, and 2024 will likely be similarly extreme. There's been nothing like this in the temperature record, and it acts as an unmistakable indication of human-driven warming. But how unusual is that warming compared to what nature has thrown at us in the past? While it's not possible to provide a comprehensive answer to that question, three European researchers (Jan Esper, Max Torbenson, and Ulf Buntgen) have provided a partial answer: the Northern Hemisphere hasn't seen anything like this in over 2,000 years. [...]

The first thing the three researchers did was try to align the temperature record with the proxy record. If you simply compare temperatures within the instrument record, 2023 summer temperatures were just slightly more than 2C higher than the 1850-1900 temperature records. But, as mentioned, the record for those years is a bit sparse. A comparison with proxy records of the 1850-1900 period showed that the early instrument record ran a bit warm compared to a wider sampling of the Northern Hemisphere. Adjusting for this bias revealed that the summer of 2023 was about 2.3 C above pre-industrial temperatures from this period. But the proxy data from the longest tree ring records can take temperatures back over 2,000 years to year 1 CE. Compared to that longer record, summer of 2023 was 2.2 C warmer (which suggests that the early instrument record runs a bit warm).

So, was the summer of 2023 extreme compared to that record? The answer is very clearly yes. Even the warmest summer in the proxy record, CE 246, was only 0.97 C above the 2,000-year average, meaning it was about 1.2 C cooler than 2023. The coldest summer in the proxies was 536 CE, which came in the wake of a major volcanic eruption. That was roughly 4 C cooler than 2023. While the proxy records have uncertainties, those uncertainties are nowhere near large enough to encompass 2023. Even if you take the maximum temperature with the 95 percent confidence range of the proxies, the summer of 2023 was more than half a degree warmer. Obviously, this analysis is limited to comparing a portion of one year to centuries of proxies, as well as limited to one area of the globe. It doesn't tell us how much of an outlier the rest of 2023 was or whether its extreme nature was global. The findings have been published in the journal Nature.

According to a new study published in the journal Technology, Mind and Behavior, researchers found that internet use is associated with greater wellbeing in people around the world. "Our analysis is the first to test whether or not internet access, mobile internet access and regular use of the internet relates to wellbeing on a global level," said Prof Andrew Przybylski, of the University of Oxford, who co-authored the work. The Guardian reports: [T]he study describes how Przybylski and Dr Matti Vuorre, of Tilburg University in the Netherlands, analysed data collected through interviews involving about 1,000 people each year from 168 countries as part of the Gallup World Poll. Participants were asked about their internet access and use as well as eight different measures of wellbeing, such as life satisfaction, social life, purpose in life and feelings of community wellbeing.

The team analyzed data from 2006 to 2021, encompassing about 2.4 million participants aged 15 and above. The researchers employed more than 33,000 statistical models, allowing them to explore various possible associations while taking into account factors that could influence them, such as income, education, health problems and relationship status. The results reveal that internet access, mobile internet access and use generally predicted higher measures of the different aspects of wellbeing, with 84.9% of associations between internet connectivity and wellbeing positive, 0.4% negative and 14.7% not statistically significant.

The study was not able to prove cause and effect, but the team found measures of life satisfaction were 8.5% higher for those who had internet access. Nor did the study look at the length of time people spent using the internet or what they used it for, while some factors that could explain associations may not have be considered. Przybylski said it was important that policy on technology was evidence-based and that the impact of any interventions was tracked.