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."

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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.

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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.

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An anonymous reader shared this report from CNN: The "world's largest" plant designed to suck planet-heating pollution out of the atmosphere like a giant vacuum began operating in Iceland on Wednesday. "Mammoth" is the second commercial direct air capture plant opened by Swiss company Climeworks in the country, and is 10 times bigger than its predecessor, Orca, which started running in 2021... Climeworks plans to transport the carbon underground where it will be naturally transformed into stone, locking up the carbon permanently... The whole operation will be powered by Iceland's abundant, clean geothermal energy.... Climeworks started building Mammoth in June 2022, and the company says it is the world's largest such plant. It has a modular design with space for 72 "collector containers" — the vacuum parts of the machine that capture carbon from the air — which can be stacked on top of each other and moved around easily. There are currently 12 of these in place with more due to be added over the next few months. Mammoth will be able to pull 36,000 tons of carbon from the atmosphere a year at full capacity, according to Climeworks. That's equivalent to taking around 7,800 gas-powered cars off the road for a year... All the carbon removal equipment in the world is only capable of removing around 0.01 million metric tons of carbon a year, a far cry from the 70 million tons a year needed by 2030 to meet global climate goals, according to the International Energy Agency [7,000x more]... Jan Wurzbacher, the company's co-founder and co-CEO, said Mammoth is just the latest stage in Climeworks' plan to scale up to 1 million tons of carbon removal a year by 2030 and 1 billion tons by 2050. Plans include potential DAC plants in Kenya and the United States.

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"Atmospheric levels of planet-warming carbon dioxide aren't just on their way to yet another record high this year," reports the Washington Post. "They're rising faster than ever, according to the latest in a 66-year-long series of observations." Carbon dioxide levels were 4.7 parts per million higher in March than they were a year earlier, the largest annual leap ever measured at the National Oceanic Atmospheric Administration laboratory atop a volcano on Hawaii's Big Island. And from January through April, CO2 concentrations increased faster than they have in the first four months of any other year... For decades, CO2 concentrations at Mauna Loa in the month of May have broken previous records. But the recent acceleration in atmospheric CO2, surpassing a record-setting increase observed in 2016, is perhaps a more ominous signal of failing efforts to reduce global greenhouse gas emissions and the damage they cause to Earth's climate. "Not only is CO2 still rising in the atmosphere — it's increasing faster and faster," said Arlyn Andrews, a climate scientist at NOAA's Global Monitoring Laboratory in Boulder, Colorado. A historically strong El Niño climate pattern that developed last year is a big reason for the spike. But the weather pattern only punctuated an existing trend in which global carbon emissions are rising even as U.S. emissions have declined and the growth in global emissions has slowed. The spike is "not surprising," said Ralph Keeling, director of the CO2 Program at Scripps Institution, "because we're also burning more fossil fuel than ever...." El Niño-linked droughts in tropical areas including Indonesia and northern South America mean less carbon storage within plants, Keeling said. Land-based ecosystems around the world tend to give off more carbon dioxide during El Niño because of the changes in precipitation and temperature the weather pattern brings, Andrews added. And for CO2 concentrations to fall back below 400 parts per million, it would take more than two centuries even if emissions dropped close to zero by the end of this century, she added. This year's reading "is more than 50 percent above preindustrial levels and the highest in at least 4.3 million years, according to NOAA."

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Longtime Slashdot reader davidwr shares a report from Space Weather Prediction Center (SWPC): On Thursday, May 9, 2024, the NOAA Space Weather Prediction Center issued a Severe (G4) Geomagnetic Storm Watch. At least five earth-directed coronal mass ejections (CMEs) were observed and expected to arrive as early as midday Friday, May 10, 2024, and persist through Sunday, May 12, 2024. Several strong flares have been observed over the past few days and were associated with a large and magnetically complex sunspot cluster (NOAA region 3664), which is 16 times the diameter of Earth. [The agency notes this is the first time it's issued a G4 watch since January, 2005.] "Geomagnetic storms can impact infrastructure in near-Earth orbit and on Earth's surface, potentially disrupting communications, the electric power grid, navigation, radio and satellite operations," NOAA said. "[The Space Weather Prediction Center] has notified the operators of these systems so they can take protective action." The agency said it will continue to monitor the ongoing storm and "provide additional warnings as necessary." A visual byproduct of the storm will be "spectacular displays of aurora," also known as the Northern Lights, that could be seen for much of the northern half of the country "as far south as Alabama to northern California," said the NOAA. "Northern Montana, Minnesota, Wisconsin and the majority of North Dakota appear to have the best chances to see it," reports Axios, citing the SWPC's aurora viewline. "Forecast models Friday showed the activity will likely be the strongest from Friday night to Saturday morning Eastern time." UPDATE 6:54 P.M. EDT: G5 conditions have been observed -- the first time since 2003, says Broadcast Meteorologist James Spann. This is a developing story. More information is available at spaceweather.gov, Google News, and the NOAA.

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The number of tornadoes so far in the United States this year is just above average. But their distribution is changing. From a report: Tornadoes tend to travel in packs these days, often with a dozen or more forming in the same region on the same day. On the worst days, hundreds can form at once. More than a dozen tornadoes were reported on both Monday and Tuesday this week across the Great Plains and the Midwest, according to the Storm Prediction Center run by the National Oceanic and Atmospheric Administration. Two weeks ago, on the most active day in April, 105 tornadoes were reported. While outbreaks like these have always happened, they have become more common in recent decades. The total number of tornadoes in the United States each year has stayed relatively consistent over the last several decades, but they now happen in more concentrated bursts over fewer days during the year. In the 1950s through the 1970s, on average about 69 percent of tornadoes in the United States happened on days with fewer than 10 tornadoes, and about 11 percent happened on days with 20 or more tornadoes. These percentages have shifted significantly in recent decades, according to a 2019 study. The researchers found that since 2000, on average only about 49 percent of tornadoes have happened on less busy days and about 29 percent have happened on days with 20 or more tornadoes. "Now when tornadoes happen, they often happen in an outbreak environment," said Tyler Fricker, an assistant professor of geography at the University of Louisiana Monroe and one of the authors of the study. While the timing of this trend lines up with the planet's rising temperatures, scientists are hesitant to definitively attribute tornadoes' clustering behavior to human-caused climate change.

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The world is on the verge of a climate abyss, the UN has warned, in response to a Guardian survey that found that hundreds of the world's foremost climate experts expect global heating to soar past the international target of 1.5C. From a report: A series of leading climate figures have reacted to the findings, saying the deep despair voiced by the scientists must be a renewed wake-up call for urgent and radical action to stop burning fossil fuels and save millions of lives and livelihoods. Some said the 1.5C target was hanging by a thread, but it was not yet inevitable that it would be passed, if an extraordinary change in the pace of climate action could be achieved. The Guardian got the views of almost 400 senior authors of reports by the authoritative Intergovernmental Panel on Climate Change. Almost 80% expected a rise of at least 2.5C above preindustrial levels, a catastrophic level of heating, while only 6% thought it would stay within the 1.5C limit. Many expressed their personal anguish at the lack of climate action. "The goal of limiting global warming to 1.5C is hanging by a thread," said the official spokesperson for Antonio Guterres, the UN secretary general. "The battle to keep 1.5C alive will be won or lost in the 2020s -- under the watch of political and industry leaders today. They need to realise we are on the verge of the abyss. The science is clear and so are the world's scientists: the stakes for all humanity could not be higher." Alok Sharma, the president of the Cop26 climate summit in 2021, said: "The results of the Guardian's survey should be another wake-up call for governments to stop prevaricating and inject much more urgency into delivering on the climate commitments they have already made." He said world leaders needed to get on and deliver on the pledge they made to transition away from fossil fuels at Cop28 in December.

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The largest ever recorded leap in the amount of carbon dioxide laden in the world's atmosphere has just occurred, according to researchers who monitor the relentless accumulation of the primary gas that is heating the planet. From a report: The global average concentration of carbon dioxide in March this year was 4.7 parts per million (or ppm) higher than it it was in March last year, which is a record-breaking increase in CO2 levels over a 12-month period. The increase has been spurred, scientists say, by the periodic El Nino climate event, which has now waned, as well as the ongoing and increasing amounts of greenhouse gases expelled into the atmosphere due to the burning of fossil fuels and deforestation. "It's really significant to see the pace of the increase over the first four months of this year, which is also a record," said Ralph Keeling, director of the CO2 Program at UC San Diego's Scripps Institution of Oceanography. "We aren't just breaking records in CO2 concentrations, but also the record in how fast it is rising." The global CO2 readings have been taken from a station perched upon the Mauna Loa volcano in Hawaii since the measurements began in 1958 under Keeling's father, Charles. The concentrations of CO2 have increased each year since, as the heat-trapping gas continues to progressively accumulate due to rampant emissions from power plants, cars, trucks and other sources, with last year hitting a new global record in annual emissions.

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Computer models have found that recent heat waves in the north Pacific may be due to a large reduction in aerosols emitted by factories in China. The findings have been published in the Proceedings of the National Academy of Sciences. Phys.Org reports: In this new effort, the research team noted that the onset of the heat waves appeared to follow successful efforts by the Chinese government to reduce aerosol emissions from their country's factories. Beginning around 2010, factories and power generating plants in China began dramatically reducing emissions of aerosols such as sulfate, resulting in much cleaner air. Noting that aerosols can act like mirrors floating in the air, reflecting heat from the sun back into space, and also pointing out that earlier research efforts had suggested that massive reductions of aerosols in one place could lead to warming in other places -- they wondered if reductions of aerosols in China might be playing a role in the heat waves that began happening in the north Pacific. To find out if that might be the case, the team began collecting data and then input it into 12 different computer climate models. They ran them under two conditions -- one where emissions from East Asia remained as they were over the past several decades and one where they dropped in the way they had in reality. They found that the models with no declines did not cause much change elsewhere, whereas those with aerosol drops showed heat waves occurring in the northeast parts of the Pacific Ocean. The models also showed why -- as less heat was reflected back into space over China, warming of coastal regions in Asia began, resulting in the development of high-pressure systems. That in turn made low-pressure systems in the middle Pacific more intense. And that resulted in the Aleutian Low growing bigger and moving south which weakened the westerly winds that typically cool the sea surface. The result was hotter conditions.

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Swedish energy company Stockholm Exergi and Microsoft have announced a 10-year deal that will provide the tech giant with more than 3.3 million tons of carbon removal certificates through bioenergy with carbon capture and storage. While the value of the deal was not disclosed, it stands as the largest of its kind globally. Carbon Herald reports: Scheduled to commence in 2028 and span a decade, the agreement underscores a pivotal moment in combatting climate change. Anders Egelrud, CEO of Stockholm Exergi, lauded the deal as a "huge step" for the company and its BECCS project, emphasizing its profound implications for climate action. "I believe the agreement will inspire corporations with ambitious climate objectives, and we target to announce more deals with other pioneering companies over the coming months," he said. Recognizing the imperative of permanent carbon removals in limiting global warming to 1.5C or below, the deal aligns with Microsoft's ambitious goal of becoming carbon negative by 2030. "Leveraging existing biomass power plants is a crucial first step to building worldwide carbon removal capacity," Brian Marrs, Microsoft's Senior Director of Energy & Carbon Removal, said, highlighting the importance of sustainable biomass sourcing for BECCS projects, as is the case with Stockholm Exergi. The partners will adhere to stringent quality standards, ensuring transparent reporting and adherence to sustainability criteria. The BECCS facility, once operational, will remove up to 800,000 tons of carbon dioxide (CO2) annually, contributing significantly to atmospheric carbon reduction. With environmental permits secured and construction set to commence in 2025, Stockholm Exergi plans to reach the final investment decision by the end of the year.

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Poor countries must demonstrate clearer accounting and transparency to back up their calls for trillions of dollars of climate finance, the president of global climate negotiations has said. From a report: Mukhtar Babayev, the ecology minister of Azerbaijan, who will lead the Cop29 UN climate summit in November, urged governments in developing countries to draw up reports showing their progress on cutting greenhouse gas emissions, and their spending on the climate crisis. "It's very important to build this correct, good and honest trust between the parties," he said in an interview in Baku, the capital of Azerbaijan. "It's a very, very important step, the creation of a transparency mechanism between the countries." At Cop29 in Baku, countries will be expected to come up with a new global goal on supplying climate finance to poorer countries, to help them cut their greenhouse gas emissions and adapt to the impacts of extreme weather. Some governments from the global south are calling for the sums to reach more than $1tn a year. These pledges are expected to be subject to bitter wrangling at Cop29, as rich countries are unlikely to agree to provide anything like such sums from their taxpayers but the role of other sources of finance -- such as the private sector -- is still in question.

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An anonymous reader quotes a report from The Guardian: Oil and gas equipment intended to cut methane emissions is preventing scientists from accurately detecting greenhouse gases and pollutants, a satellite image investigation has revealed. Energy companies operating in countries such as the US, UK, Germany and Norway appear to have installed technology that could stop researchers from identifying methane, carbon dioxide emissions and pollutants at industrial facilities involved in the disposal of unprofitable natural gas, known in the industry as flaring. Flares are used by fossil fuel companies when capturing the natural gas would cost more than they can make by selling it. They release carbon dioxide and toxic pollutants when they burn as well as cancer-causing chemicals. Despite the health risks, regulators sometimes prefer flaring to releasing natural gas -- which is 90% methane -- directly into the atmosphere, known as "venting". The World Bank, alongside the EU and other regulators, have been using satellites for years to find and document gas flares, asking energy companies to find ways of capturing the gas instead of burning or venting it. The bank set up the Zero Routine Flaring 2030 initiative at the Paris climate conference to eradicate unnecessary flaring, and its latest report stated that flaring decreased by 3% globally from 2021 to 2022. But since the initiative, "enclosed combustors" have begun appearing in the same countries that promised to end flaring. Experts say enclosed combustors are functionally the same as flares, except the flame is hidden. Tim Doty, a former regulator at the Texas Commission on Environmental Quality, said: "Enclosed combustors are basically a flare with an internal flare tip that you don't see. Enclosed flaring is still flaring. It's just different infrastructure that they're allowing. "Enclosed flaring is, in truth, probably less efficient than a typical flare. It's better than venting, but going from a flare to an enclosed flare or a vapor combustor is not an improvement in reducing emissions." The only method of detecting flaring globally is by using satellite-mounted tools called Visible Infrared Imaging Radiometer Suite of detectors (VIIRS), which find flares by comparing heat signatures with bright spots of light visible from space. But when researchers tried to replicate the database, they saw that the satellites were not picking up the enclosed flares. Without the satellite data, countries were forced to rely mostly on self-disclosed reporting from oil and gas companies, researchers said. Environmentalists fear the research community's ability to understand pollution and greenhouse gas emissions from the energy sector could be jeopardized.

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Large swathes of Asia are sweltering through a heatwave that has topped temperature records from Myanmar to the Philippines and forced millions of children to stay home from school. From a report: In India, record temperatures have triggered a deadly heatwave and concerns about voter turnout in the nation's marathon election. Extreme heat has also forced Bangladesh to close all schools across the country. Extreme temperatures have also been recorded in Myanmar and Thailand, while huge areas of the Philippines are suffering from a drought. Experts say climate change has made heatwaves more frequent, longer and more intense, while the El Nino weather phenomenon is also driving this year's exceptionally warm weather. Approximate voter turnout data after polls closed on April 26 in India -- when stage two of the nation's seven-stage general election took place -- put voter turnout at 61 per cent. This was lower than the 65 per cent in the first phase, and 68 per cent in the second phase five years ago. Among the states that headed to the polls last week was Kerala in the south, where media reports on April 29 said that at least two people -- a 90-year-old woman and a 53-year-old man -- were suspected to have died of heatstroke. Temperatures in Kerala soared to 41.9 deg C, nearly 5.5 deg C above normal temperatures. At least two people have also died in India's eastern state of Odisha, where temperatures hit 44.9 deg C on April 28 -- the highest recorded in April. In neighbouring Bangladesh, students will continue to stay home this week, after schools across the country were ordered shut on April 29. A two-judge bench of the country's High Court passed an order directing all primary and secondary schools and madrasahs (Islamic schools) nationwide to remain closed till May 5, affecting an estimated 32 million students.

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An anonymous reader quotes a report from Reuters: Energy ministers from the Group of Seven (G7) major democracies reached a deal to shut down their coal-fired power plants in the first half of the 2030s, in a significant step towards the transition away from fossil fuels. "There is a technical agreement, we will seal the final political deal on Tuesday," said Italian energy minister Gilberto Pichetto Fratin, who is chairing the G7 ministerial meeting in Turin. On Tuesday the ministers will issue a final communique detailing the G7 commitments to decarbonize their economies. Pichetto said the ministers were also pondering potential restrictions to Russian imports of liquefied natural gas to Europe which the European Commission is due to propose in the short-term. The agreement on coal marks a significant step in the direction indicated last year by the COP28 United Nations climate summit to phase out fossil fuels, of which coal is the most polluting. Italy last year produced 4.7% of its total electricity through a handful of coal-fired stations. Rome currently plans to turn off its plants by 2025, except on the island of Sardinia where the deadline is 2028. In Germany and Japan coal has a bigger role, with the share of electricity produced by the fuel higher than 25% of total last year. "This is another nail in the coffin for coal," said Dave Jones, Ember's Global Insights program director. "The journey to phase out coal power has been long: it's been over seven years since the UK, France, Italy, and Canada committed to phase out coal power, so it's good to see the United States and especially Japan at last be more explicit on their intentions." "The problem is that whilst coal power has already been falling, gas power has not. G7 nations already promised to 'fully or predominantly' decarbonize their power sectors by 2035, and that would mean phasing out not only coal by 2035 but also gas. Coal might be the dirtiest, but all fossil fuels need to be ultimately phased out." Further reading: Countries Consider Pact To Reduce Plastic Production By 40% in 15 Years

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Countries are for the first time considering restrictions on the global production of plastic -- to reduce it by 40% in 15 years -- in an attempt to protect human health and the environment. From a report: As the world attempts to make a treaty to cut plastic waste at UN talks in Ottawa, Canada, two countries have put forward the first concrete proposal to limit production to reduce its harmful effects including the huge carbon emissions from producing it. The motion submitted by Rwanda and Peru sets out a global reduction target, ambitiously termed a "north star," to cut the production of primary plastic polymers across the world by 40% by 2040, from a 2025 baseline. It says: "The effectiveness of both supply and demand-side measures will be assessed, in whole or in part, on their success in reducing the production of primary plastic polymers to sustainable levels." The proposal calls for the consideration of mandatory reporting by countries of statistical data on production, imports and exports of primary plastic polymers. A global plastic reduction target would be similar to the legally binding Paris agreement to pursue efforts to limit global temperature increase to 1.5C above preindustrial levels, Rwanda and Peru said.

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Oakland, California is now home to "the first commercial hydrogen fuel station for big-rig trucks in the United States," according to the Los Angeles Times — serving 30 hydrogen fuel-cell trucks. The newspaper says the facility "could mark the start of a nationwide network for fuel-cell truck refueling. It could also flop." Hydrogen fuel is expensive — as much as four times more expensive than gasoline or diesel fuel. The fuel cells, which drive electric motors to drive the truck, are enormously expensive as well.... The vehicles themselves are expensive too. Both battery electric and hydrogen fuel-cell trucks can cost three times as much or more than a $120,000 diesel truck. Those buying the trucks can qualify for state and federal subsidies to make up most of the upfront costs. But government regulations may spark some demand: New diesel truck sales will be outlawed in California by 2036. Only zero-tailpipe-emission new trucks will be allowed. Already, zero-emission requirements are in place for trucks that enter ocean ports. And only two technologies are available to achieve that goal: battery electric trucks and hydrogen fuel-cell trucks. "We believe a good portion of those will be hydrogen vehicles," said Matt Miyasato, chief of public policy for hydrogen fuel distributor FirstElement Fuel. FirstElement, through its True Zero brand fueling stations, is the largest hydrogen vehicle fuel distributor in the U.S... Battery electric is gaining a strong foothold in the medium-sized delivery truck market, but hydrogen could have a leg up for long-haul trucking. While a fuel cell is comparable in size to a diesel engine, a battery big enough for long-haul trucks adds weight and size and cuts down on the total freight load the truck can deliver. And while an electric truck battery can take hours to recharge, the refill time for hydrogen is more comparable to filling up with diesel fuel.

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An international team of scientists used 1.8 billion letters of genetic code from more than 9,500 species covering almost 8,000 known flowering plant genera to create the most up-to-date understanding of the flowering plant tree of life. The research has been published in the journal Nature. Phys.Org reports: The major milestone for plant science, led by [Royal Botanic Gardens, Kew] and involving 138 organizations internationally, was built on 15 times more data than any comparable studies of the flowering plant tree of life. Among the species sequenced for this study, more than 800 have never had their DNA sequenced before. The sheer amount of data unlocked by this research, which would take a single computer 18 years to process, is a huge stride towards building a tree of life for all 330,000 known species of flowering plants -- a massive undertaking by Kew's Tree of Life Initiative. The flowering plant tree of life, much like our own family tree, enables us to understand how different species are related to each other. The tree of life is uncovered by comparing DNA sequences between different species to identify changes (mutations) that accumulate over time like a molecular fossil record. Our understanding of the tree of life is improving rapidly in tandem with advances in DNA sequencing technology. For this study, new genomic techniques were developed to magnetically capture hundreds of genes and hundreds of thousands of letters of genetic code from every sample, orders of magnitude more than earlier methods. A key advantage of the team's approach is that it enables a wide diversity of plant material, old and new, to be sequenced, even when the DNA is badly damaged. The vast treasure troves of dried plant material in the world's herbarium collections, which comprise nearly 400 million scientific specimens of plants, can now be studied genetically. [...] Across all 9,506 species sequenced, more than 3,400 came from material sourced from 163 herbaria in 48 countries. Additional material from plant collections around the world (e.g., DNA banks, seeds, living collections) have been vital for filling key knowledge gaps to shed new light on the history of flowering plant evolution. The team also benefited from publicly available data for more than 1,900 species, highlighting value of the open science approach to future genomic research. Flowering plants alone account for about 90% of all known plant life on land and are found virtually everywhere on the planet -- from the steamiest tropics to the rocky outcrops of the Antarctic Peninsula. [...] Utilizing 200 fossils, the authors scaled their tree of life to time, revealing how flowering plants evolved across geological time. They found that early flowering plants did indeed explode in diversity, giving rise to more than 80% of the major lineages that exist today shortly after their origin. However, this trend then declined to a steadier rate for the next 100 million years until another surge in diversification about 40 million years ago, coinciding with a global decline in temperatures. These new insights would have fascinated Darwin and will surely help today's scientists grappling with the challenges of understanding how and why species diversify. A list of "remarkable species" included in the flowering plant tree of life is embedded below the article. Looking ahead, the study's authors believe this data will aid future attempts to identify new species, refine plant classification, uncover new medicinal compounds, and conserve plants in the face of climate change and biodiversity loss.

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