An anonymous reader quotes a report from the Guardian: Walking into Mexico City's sprawling central Zocalo is a dizzying experience. At one end of the plaza, the capital's cathedral, with its soaring spires, slumps in one direction. An attached church, known as the Metropolitan Sanctuary, tilts in the other. The nearby National Palace also seems off-kilter. The teetering of many of the capital's historic buildings is the most visible sign of a phenomenon that has been ongoing for more than a century: Mexico City is sinking at an alarming rate. Now, the metropolis's descent is being tracked in real time thanks to one of the most powerful radar systems ever launched into space. Known as Nisar, the satellite can detect minute changes in Earth's surface, even through thick vegetation or cloud cover. "Nisar takes radar imaging observations of Earth to the next level," said Marin Govorcin, a scientist at Nasa's jet propulsion laboratory. "Nisar will see any change big or small that happens on Earth from week to week. No other imaging mission can claim this." Though not the first time that Mexico City's sinking has been observed from space, the Nisar mission has provided a greater sense of how far the sinking spreads and how it changes across different types of land than any other space-based sensor. It has also been able to penetrate areas on the outskirts of the city that were previously challenging to study because of the complex terrain. The implications of the imagery extend far beyond the Mexican capital. "This study of Mexico City speaks to the realm of possibilities that will open up thanks to the Nisar system," said Dario Solano-Rojas, an engineer at the National Autonomous University of Mexico (Unam). "And not just for sinking cities but also for studying volcanoes, for studying the deformation associated with earthquakes, for studying landslides." According to Nasa, the technology is also capable of monitoring the climate crisis, glacier sliding, agricultural productivity, soil moisture, forestry, coastal flooding and more. The Nisar system found that some parts of the city are dropping by more than 2cm a month. "First documented in 1925, the city's sinking is a result of centuries of exploitation of the groundwater," the report says. "Because Mexico City and its surrounds were built on an ancient lake bed, the soil beneath the city is extremely soft. When water is pumped out of the aquifer below, this clay-like earth compacts, resulting in a city that is quietly sinking." The crisis is also self-reinforcing: as the city sinks, aging pipes crack and leak, causing Mexico City to lose an estimated 40% of its water, even as drought and climate change make supplies more fragile.

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Longtime Slashdot reader Qbertino writes: The Fehrmarnbelt tunnel is a European construction megaproject building a tunnel between Denmark and Germany, crossing the Fehmarnbelt in the Baltic sea. The first segment of the tunnel has now successfully been placed in its designated spot. This is a yet-unseen, next-level engineering feat achieved by the Danish Sund & Baelt construction company. It took 14 hours and used a massive pontoon ship built specifically for this project. The tunnel segments are 217 meters long, weigh more than 73,000 metric tons, and have to be placed within a tolerance of 3 mm. The tunnel will eventually consist of 89 of these segments, be 18 km long, and connect the Danish city of Rodby with the German island Fehmarn through five individual tunnel tubes: two for cars, two for trains, and one rescue and maintenance tunnel. Crossing time will be reduced from a 45-minute ferry crossing to seven minutes by train or 10 minutes by car, and cut the travel time between the German city of Hamburg and the Danish capital, Copenhagen, down to 2.5 hours. The project's planned completion is set for the year 2029. German news Tagesschau has some details and a neat animation, while further details are available from the German tech news site Heise.

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Atmospheric carbon dioxide hit a new record in April, averaging about 431 parts per million at NOAA's Mauna Loa Observatory. That's up from under 320 ppm when the site began measurements in 1958. Scientific American reports: Greenhouse gases, such as carbon dioxide, are measured as a proportion of the total atmosphere. The numbers are presented as the number of molecules of a particular gas out of a million total molecules, or ppm. Climate scientist Zachary Labe of Climate Central, a nonprofit that researches climate change, says the new record is "depressing" but not unexpected. "It's just another sign that carbon dioxide continues to increase in our atmosphere as our planet continues to warm," he says. "For many climate scientists, this is just 'here it is again, another record in the wrong direction.'" Labe explains that the amount of CO2 in the atmosphere tends to peak in April each year as decaying plants release greenhouse gases after winter. Some of that CO2 gets reabsorbed by plants as they grow during the warmer months. But NOAA's data show a worrying trend, with the average monthly amount of CO2 steadily increasing. [...] Although the amount of CO2 in the atmosphere has continued to rise, there was a reduction in U.S. emissions in 2023 and 2024. That trend, however, was reversed in 2025, at least partially because of the increased electricity demand from artificial intelligence data centers. Still, Labe says there are reasons for optimism as the use of renewable energy sources such as solar and wind expands.

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A new Nature Climate Change study suggests airborne microplastics -- especially darker and colored particles -- are likely contributing to atmospheric warming by absorbing more heat than they reflect. Researchers estimate the effect could be roughly one-sixth that of black carbon, though outside experts say the uncertainties remain large and more study is needed before drawing firm policy conclusions. "We can say with confidence that overall they are warming agents," said Drew Shindell, a Duke University earth science professor and co-author of the study. "To me, that's the big advance." The Washington Post reports: To undertake their study, a group led by researchers at Fudan University in China examined how different colors and sizes of microplastics interact with light across the spectrum, while combining that information with simulations of how particles get dispersed in the air across the planet. "Black, yellow, blue and red [particles] absorb sunlight much more strongly than the white particles," Yu Liu, a Fudan professor and study co-author, said in a call with reporters. In fact, the study details how black and colored particles showed "absorption levels nearly 75 times higher than pristine, non-pigmented plastics." The scientists also found that different sizes of particles absorb light at different intensities -- and that how they absorb light can change as they age. The authors estimate that microplastics suspended in the atmosphere could be contributing to global warming at about one-sixth the amount of black carbon, also known as soot, a pollutant generated largely from burning fossil fuels. If the latest estimates are right, Shindell said, microplastics might not be an enormous source of atmospheric warming, compared with massive contributors such as cars and trucks, belching industrial plants or even burping cows. "But not a trivial one, either," he said. By his calculation, the effect of one year's microplastic emissions globally is approximately equivalent to 200 coal-fired power plants running for that year. But that rough estimate does not factor the longer-term repercussions of microplastics decaying and persisting in the environment for decades to come. Whatever the exact impact, the topic deserves further study, the authors say, because current climate modeling does not account for any additional warming that these tiny particles might be causing.

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Monday a company called Rainmaker announced their rain-triggering technology had produced 143 million gallons of freshwater for Utah and Oregon residents — making them "the first private company in history to validate the results of cloud seeding operations." The Deseret News reports: Founded in 2023, Rainmaker uses drones to disperse silver iodide into clouds, then they track precipitation with advanced radar. However, Rainmaker — and every other rain-enhancement company — has been up against the notoriously difficult challenge of validation. Since there is no control set to test, and because the weather is chaotic and variable, the Government Accountability Office declares the benefits of the technology to be "unproven." To overcome this evaluation challenge, Rainmaker flies drones in unique patterns when seeding. Then operators compare distinct radar and satellite features with where their drones operated. As of April, Rainmaker found 82 unambiguous seeding signatures, which show their seeding operations directly caused precipitation. In Utah and Oregon alone, the company said its cloud-seeding efforts have added enough water to match the annual usage of about 1,750 households. However, "this figure likely represents only a small fraction of Rainmaker's total generation this season," the company said in their press release... Their drone precision, combined with their radar systems, have produced satellite images proving a direct correlation between the seeding and precipitation. Some images show cloud holes or regions of depressed cloud tops after seeding. Rainmaker's announcement promises they'll "go forward and continue our mission to refill the Great Salt Lake, end drought in the American West and deliver water abundance wherever it is needed most around the world." (Rainmaker currently operates in Utah, Idaho, Oregon, California and Colorado.) The director of Utah's Natural Resources Department told the Deseret News that with cloud seeding, "cost per unit of water is so low; it really is the smartest thing we can be doing with our money," Ferry said.

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fjo3 shares a report from the Washington Post: Surging concentrations of carbon in the atmosphere, caused largely by burning fossil fuels, have produced potent changes in the way plants grow -- from increasing their sugar content to depleting essential nutrients like zinc. Experts fear the degradation of Earth's food supply will cause an epidemic of hidden hunger, in which even people who consume enough calories won't get the nutrients they need to thrive. "The diets we eat today have less nutritional density than what our grandparents ate, even if we eat exactly the same thing," said Kristie Ebi, a professor at the University of Washington's Center for Health and the Global Environment. People in wealthy countries with strong health care systems will have many tools to cope with the change, experts said. But for the world's poorest and most vulnerable, the consequences could be devastating. One study concluded that by the middle of the century the phenomenon could put more than a billion additional women and children at risk of iron-deficiency anemia -- a condition that can cause pregnancy complications, developmental problems and even death. Meanwhile, some 2 billion people across the globe who already suffer from some form of nutrient shortage could see their health problems grow even worse. "The scale of the problem is huge," Ebi said. Plants depend on carbon dioxide to perform photosynthesis -- but that doesn't mean they grow better when there's more carbon in the air, scientists say. A sweeping survey of changes among 32 compounds in 43 crops found that nearly every plant that humans eat is harmed by rising CO2 levels. [...] For the past several years, [Sterre F. ter Haar, an environmental scientist at Leiden University in the Netherlands and lead author of the survey] and her colleagues have worked to compile a database of all existing research on nutrient changes linked to rising CO2. They tracked down hundreds of studies, ranging from tightly controlled lab experiments to sprawling global analyses of real-world crops. Next the team used their dataset to calculate the nutritional densities of each crop under different carbon dioxide levels -- and to predict how their composition could continue to shift in the future. On average, they found, nutrients have already decreased by an average 3.2 percent across all plants since the late 1980s, when the concentration of carbon dioxide in the atmosphere was about 350 parts per million. That figure may seem small, ter Haar said, but with so much of the world already living on the brink of nutrient insufficiency, a drop of just a few percentage points has the potential to push millions of additional people into a health crisis. Researchers are still trying to understand the exact causes of this change. Extra CO2 can make plants grow faster and produce more carbohydrates, but without a matching increase in mineral uptake, nutrients like zinc, iron, and protein become diluted. Higher CO2 also causes plants to open their leaf pores less often, reducing the amount of water -- and dissolved minerals -- they absorb through their roots. At the same time, higher temperatures can further disrupt soil chemistry, affecting how plants take up nutrients and, in some cases, increasing their absorption of harmful substances like arsenic.

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RightsCon, one of the world's largest digital human rights conferences, was suddenly postponed by Zambia's government just days before it was scheduled to begin in Lusaka. Officials cited unresolved speaker clearances and "thematic issues," while Access Now said it had not yet received formal communication and was seeking an urgent meeting with the government. 404 Media reports: Minister of Technology and Science Felix Mutati first announced the postponement on April 28, saying that Zambia needed more time to ensure the conference "fully [aligns] with national procedures, diplomatic protocols, and the broader objective of fostering a balanced and consensus-driven platform for dialogue." "In particular, certain invited speakers and participants remain subject to pending administrative and security clearances, which have not yet been concluded," he added, according to the Lusaka Times. [...] On a popular listserv for academics, many of whom are attending RightsCon, a board member of Access Now wrote "I am told I can leak that RightsCon has been canceled. Message from [Access Now] following shortly" in a thread about what attendees were planning on doing. And in an email, AccessNow wrote: "It is with heavy hearts that we share: RightsCon will not proceed in Zambia or online. We understand this news is deeply upsetting for our community and while we know everyone has questions, our goal right now is to notify you of the event's status because many of you have imminent travel plans. We do not recommend registered participants travel to Lusaka for RightsCon. Over the last 48 hours we have experienced an overwhelming surge of support from civil society, government representatives, sponsors, and our community as a whole. For this, we wholeheartedly thank you. We'll communicate more information soon."

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fjo3 writes: The United Arab Emirates announced Tuesday that it would exit the Organization of the Petroleum Exporting Countries (source paywalled; alternative source), or OPEC, along with the wider group of partners known as OPEC+, effective May 1, in what could be a blow to control over prices by the group, long led in practice by Saudi Arabia. The move "reflects the UAE's long-term strategic and economic vision and evolving energy profile" read an official statement carried by a UAE state news agency, as disruptions "in the Strait of Hormuz continues to affect supply dynamics." [...] The UAE is the second Persian Gulf country to leave the group after Qatar terminated its membership in 2019. The UAE has been a member of OPEC since 1971. The latest departure leaves in place 11 core members: Algeria, Congo, Equatorial Guinea, Gabon, Iran, Iraq, Kuwait, Libya, Nigeria, Saudi Arabia and Venezuela.

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Public stock exchanges "appear to be warming to climate tech startups," reports TechCrunch. "Or at least some of them." This week, nuclear startup X-energy went public, raising $1 billion in an upsized share offering that appears to have delivered a windfall for its investors, including Amazon [and Google]. Retail investors apparently can't get enough, with the stock popping 25% in its first hour of trading. Also this week, geothermal startup Fervo said it filed for an initial public offering. The size of the Fervo IPO has yet to be disclosed, but private investors have valued the company at around $3 billion, according to PitchBook. The move to go public aligns with what investors told TechCrunch at the end of last year. After years of tepid attitudes toward climate tech companies, they expected public markets to start welcoming energy-related startups. Nearly every investor that weighed in on the question said the startups with the best chances of going public specialize in either nuclear fission or enhanced geothermal. Fervo, specifically, was mentioned several times. Thank data centers for that. The AI craze has taken a trend of rising demand for electricity and made it sexy and salable.

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Ancient Slashdot reader hwstar shares a report from The Conversation: For the first time ever, more than 50 nations will gather next week in Colombia to hash out how to wind down and end their dependence on coal, oil and gas. The history-making conference was planned before the Iran war. But this year's energy crisis has greatly raised the stakes. [...] Around 80% of the trapped oil was destined for the Asia-Pacific. Faced with dwindling supply, the region's governments are implementing emergency measures such as sending workers home, banning government travel, rationing fuel and cutting school hours. The problem is especially bad in the Pacific. Many island nations use diesel for power generation. In response, leaders declared a regional emergency. [...] But the real difference from half a century ago is that fossil fuel alternatives are ready for prime time. Since the 1970s, the price of solar panels has fallen 99.9%, while the cost of wind has fallen 91% since 1984. Battery prices have fallen 99% since 1991. [...] This year's oil shock shows signs of creating an unplanned social tipping point -- a threshold for self-propelling change beyond which systems shift from one state to another. Climate scientists warn of climate tipping points which amplify feedback and accelerate warming. But social scientists also point to positive tipping points -- collective action that rapidly accelerates climate action. [...] The routine burning of coal, oil and gas is the primary driver of the climate crisis. The world's highest court last year made clear nations have obligations to stop burning fossil fuels. But fossil fuels have barely been mentioned in 30 years of global climate negotiations, due in part to blocking efforts by big fossil fuel exporters and lobbyists. Frustrated by slow progress, a coalition of nations has bypassed global climate talks to discuss how to actually phase out fossil fuels. The first of these summits will take place next week. More than 50 nations will gather in Santa Marta, Colombia, to discuss a potential standalone treaty to manage fossil-fuel phaseout while protecting workers and financial systems.

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An anonymous reader quotes a report from the New York Times: Many scientists have contended that humans have evolved very little over the past 10,000 years. A few hundred generations was just a blink of the evolutionary eye, it seemed. Besides, our cultural evolution -- our technology, agriculture and the rest -- must have overwhelmed our biological evolution by now. A vast study, published on Wednesday in the journal Nature, suggests the opposite. Examining DNA from 15,836 ancient human remains, scientists found 479 genetic variants that appeared to have been favored by natural selection in just the past 10,000 years. The researchers also concluded that thousands of additional genetic variants have probably experienced natural selection. Before the new study, scientists had identified only a few dozen variants. "There are so many of them that it's hard to wrap one's mind around them," said David Reich, a geneticist at Harvard Medical School and an author of the new study. He and his colleagues found that a mutation that is a major risk factor for celiac disease, for example, appeared just 4,000 years ago, meaning the condition may be younger than the Egyptian pyramids. The mutation became ever more common. Today, an estimated 80 million people worldwide have celiac disease, in which the immune system attacks gluten and damages the intestines. The steady rise of the mutation came about through natural selection, the scientists argue. For some reason, people with the mutation had more descendants than people without it -- even though it put them at risk of an autoimmune disorder. Other findings are even more puzzling. The researchers found that genetic variants that raise the odds of a smoking habit have been getting steadily rarer in Europe for the past 10,000 years. Something is working against those variants -- but it can't be the harm from smoking. Europeans have been smoking tobacco for only about 460 years. The scientists can't see from their research so far what forces might be making these variants more or less common. "My short answer is, I don't know," said Ali Akbari, a senior staff scientist at Harvard and an author of the study. The researchers also found that some variants, like the one linked to Type B blood, became much more common in Europe around 6,000 years ago, while others changed direction over time. For example, a TYK2 immune gene variant that may have once been beneficial later became harmful because it increased tuberculosis risk. The study also found signs of natural selection in 44 out of 563 traits. Variants linked to Type 2 diabetes, wider waists, and higher body fat have become less common, possibly because farming and carbohydrate-heavy diets made once-useful fat-storing traits more harmful. Other findings, such as selection favoring genes linked to more years of schooling, are harder to interpret.

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BrianFagioli shares a report from NERDS.xyz: For years pop culture has treated April 25 as the "perfect date," thanks to the famous Miss Congeniality line about needing only a light jacket. But new analysis from WeatherBug suggests that idea does not actually hold up when you look at the numbers. After reviewing U.S. weather data from 2018 through today, the company concluded that October 8 delivers the most reliable combination of comfortable temperatures and low rainfall nationwide. According to the analysis, the average conditions on that day land around 66F with just 0.0573 inches of precipitation. The study used population weighted weather data drawn from roughly 20 million daily WeatherBug users across the United States. When the company compared all days of the year, April 25 ranked only 80th, averaging about 60F and roughly 0.1297 inches of rain. The broader dataset also shows July dominating the hottest days of the year while January owns the coldest, with January 20 averaging just 33F nationally. While no single date guarantees perfect weather everywhere in a country as large as the U.S., the numbers suggest early October may quietly offer one of the most reliable windows for comfortable outdoor conditions.

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Renewables made up nearly half of global installed electricity capacity by the end of 2025, "accounting for 85.6% of global capacity expansion," reports the Register, citing the International Renewable Energy Agency's (IRENA) 2026 Renewable Capacity Statistics report. "Per IRENA's data, that aforementioned 85.6 percent share of new power capacity additions was actually a decrease from 2024, when renewables were about 92 percent of global capacity additions. Yes, the share of total installed power capacity in 2025 rose again, but non-renewable capacity additions also rebounded sharply last year." From the report: Solar, in turn, was the dominant renewable technology, accounting for nearly three-quarters of last year's renewable capacity additions. Those additions totaled 692 GW in 2025, lifting installed renewable capacity by a record 15.5 percent year over year, IRENA noted. By the end of last year, renewables accounted for 49.4 percent of global installed electricity capacity, while variable renewable sources such as solar and wind represented roughly 35 percent of total capacity. For reference, it was only in 2023 that renewable energy sources crossed the threshold of generating 30 percent of the world's electricity.

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More than 30 billion images captured by Pokemon Go players have helped train a visual mapping system developed by Niantic. The technology is now being used to guide delivery robots from Coco Robotics through city streets where GPS often struggles. Popular Science reports: This week, Niantic Spatial, part of the team behind Pokemon Go, announced a partnership with Coco Robotics, a company that makes short-distance delivery robots for food and groceries. Soon, those robot couriers will scoot around sidewalks using Niantic's Visual Positioning System (VPS)-- a navigation tool that can reportedly pinpoint location down to a few centimeters just by looking at nearby buildings and landmarks. Niantic trained that VPS model on more than 30 billion images captured by Pokemon Go users, and claims it will help robots operate in areas where GPS falls short. [...] Instead of helping users navigate the way that GPS does, VPS determines where someone is based on their surroundings. That makes Pokemon Go particularly useful as a data source, because players had to physically travel to specific locations and point their phones at various angles. That mapping effort got a significant boost in 2020, when the app added what it called "Field Research," a feature prompting players to scan real-world statues and landmarks with their cameras in exchange for in-game rewards. A portion of the data also reportedly came from areas known as "Pokemon battle arenas." Whether players knew it or not, those scans were creating 3D models of the real world that would eventually power the Niantic model. More data means better accuracy, and because Niantic was collecting images of the same locations from many different users, it could capture the same spots across varying weather conditions, lighting, angles, and heights. [...] The idea is that Coco's robots can use VPS and four cameras mounted around the machine to get a far more precise read on their surroundings. In turn, the well-equipped robot will deliver food on time. On a broader level, Niantic says its partnership with Coco Robotics is part of a longer-term effort to build a "living map" of the world that updates as new data becomes available. Once VPS-equipped delivery robots hit the streets, they will collect even more info that can be fed back into the model to bolster its accuracy further. This kind of continuous, real-world data collection is already central to how self-driving vehicle companies like Waymo and Tesla operate, and is a large part of why that technology has improved so significantly in recent years.

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California saw its worst drought in 10,000 years between 2012 and 2015, remembers the Washington Post. And yet genetic analyses of California's scarlet monkeyflower "found that many rapidly evolved... allowing them to cope with water scarcity and rebound from decline." "The fact that certain organisms are able to adapt just because of genetics that are already present is a great source of hope," said Daniel Anstett, a plant biologist at Cornell University and lead author on a new study on the issue. "It's one more arrow in the quiver of different ways that populations might be able to survive the massive climate change we're inflicting on the planet." The recovery of [Sequoia National Park's] scarlet monkeyflowers offers rare, real-world evidence of what scientists call "evolutionary rescue," according to the study published Thursday in the journal Science. It suggests that some species may be able to evolve quickly enough to keep up with the accelerating consequences of human-caused warming — essentially saving themselves from extinction. This discovery could help people decide how to distribute limited conservation funds by pinpointing which species have enough genetic diversity to be resilient, ecologists Mark Urban and Laurinne Balstad, who were not involved in the study, wrote in a separate analysis published by Science. "The challenge going forward is to identify when evolutionary rescue is possible, when it is not, and how to rescue those species that cannot rescue themselves," Urban and Balstad wrote.

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Asian governments are implementing emergency measures like four-day workweeks and work-from-home mandates to cope with a fuel shortage triggered by the Iran conflict and the closure of the Strait of Hormuz. "Asia is particularly dependent on oil exports from the Middle East; Japan and South Korea respectively source 90% and 70% of their oil from the region," notes Fortune. From the report: On March 10, Thailand ordered civil servants to take the stairs rather than the elevator, and to work-from-home for the duration of the crisis. It increased the air-conditioning temperature to 27 degrees Celsius, and will tell government employees to wear short-sleeved shirts over suits. (Thailand has about 95 days of energy reserves left, according to Reuters). Vietnam also called on businesses to let people work-from-home to "reduce the need for travel and transportation." The Philippines is pushing for a four-day work week, and has ordered officials to limit travel "to essential functions only." South Asia is getting hit hard too. Bangladesh brought forward the Eid-al-fitr holiday, allowing universities to close early in a bid to save fuel. Pakistan also instituted a four-day week for government offices and closed schools. India suspended shipments of liquefied petroleum gas to commercial operators to prioritize supplies for households, leading to worries from hotels and restaurants that they may be forced to close without fuel supplies. Countries across the region are also considering price caps, subsidies, and tapping strategic oil reserves. On Wednesday, the International Energy Agency "unanimously" agreed to release 400 million barrels of oil and refined products from its reserves. The Associated Press offers a look at the energy supplies that countries hold and when they tap them.

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Jordan Drysdale // Step 1: Craigslist Step 2: Magic Time Step 3: Profit $$$$$$ I traveled to Scottsdale last year to enjoy some Citrus fruit around my uncle’s pool after […]

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