"Researchers are proposing a new way to battle the effects of climate change..." writes Science magazine: slowing the rising of sea levels with "glacial geoengineering". (That is, "building flexible barriers around them or drilling deep into them to slow their slippage into the sea.") Geoengineering proponents say it would be better to begin research now on how to staunch sea level rise at its source, rather than spending billions and billions of dollars to wall off coastal cities. "At some point you have to think, 'Well, is there anything else we can do?'" asks glaciologist John Moore of the University of Lapland, an author on the white paper, which was sponsored by the University of Chicago. One idea researched by Moore and covered in the report is to build buoyant "curtains," moored to the sea floor beyond the edge of ice shelves and glaciers, to block natural currents of warm water that erode ice sheets from below. (Especially in Antarctica, warming ocean water is a bigger threat to glaciers than warming air.)

Early designs called for plastic, but natural fibers such as canvas and sisal are now being considered to avoid pollution concerns. According to the white paper, initial modeling studies show that curtain heights stretching only partway up from the sea floor off the coast of western Antarctica could reduce glacial melting by a factor of 10 in some locations. Another intervention some scientists are contemplating would slow the slippage of ice sheets by drilling holes to their bases and pumping out water or heat.

Such massive engineering efforts would surely be some of the most expensive ever undertaken by humanity. At a workshop at the University of Chicago in October 2023, researchers suggested it might cost $88 billion to build 80 kilometers of curtains around Antarctic glaciers. Interventions would also require international political support, which some glaciologists view as an even bigger hurdle than the price tag. Twila Moon, a glaciologist at the U.S. National Snow and Ice Data Center, says such projects would require fleets of icebreakers, extensive shipping and supply chain needs, and significant personnel to construct, maintain, and guard the final structures — in ocean conditions she calls "eye-poppingly difficult." The projects could also incur unintended consequences, potentially disrupting ocean circulation patterns or endangering wildlife. Furthermore, it would take decades to find out whether the interventions were working.

Even if the engineering and logistics were possible, that "does not answer the question of whether it should be pursued," says Moon, who opposes even preliminary studies on the concepts.
"The report, which also stresses the importance of emissions reductions, takes pains to say it 'does not advocate for intervention; rather, it advocates for research into whether any interventions may be viable'..."

clovis (Slashdot reader #4,684) writes: Joe Engle received his astronaut wings in a ceremony on July 15, 1965, for his flight in the hypersonic aircraft, reaching an altitude of 50 miles above the Earth. At 32, he was the youngest man to become an astronaut.

Later, he entered the Apollo program and eventually commanded the STS-2 flight of the Space Shuttle.

Here is an interview from 2004. I thought it was interesting that they used the F-104 as the chase plane and for training because the flight characteristics were so similar, which says a lot about the F-104.

Anyway, the X-15 project was a big deal for us science/geek types back when I was a kid. I wonder if it's something today's generation is even aware of.

An anonymous reader quotes a report from Reuters: SpaceX's workhorse Falcon 9 rocket was grounded by the U.S. Federal Aviation Administration (FAA) on Friday after one broke apart in space and doomed its payload of Starlink satellites, the first failure in more than seven years of a rocket relied upon by the global space industry. Roughly an hour after Falcon 9 lifted off from the Vandenberg Space Force Base in California on Thursday night, the rocket's second stage failed to reignite and deployed its 20 Starlink satellites on a shallow orbital path where they will soon reenter and burn up in Earth's atmosphere.

The attempt to reignite the engine "resulted in an engine RUD for reasons currently unknown," SpaceX CEO Elon Musk wrote early on Friday on his social media platform X, using an industry acronym for Rapid Unscheduled Disassembly that usually means explosion. The Falcon 9 will be grounded until SpaceX investigates the cause of the failure, fixes the rocket and receives the agency's approval, the FAA said in a statement. That process could take several weeks or months, depending on the complexity of the failure and SpaceX's plan to fix it. Musk said SpaceX was updating the software of the Starlink satellites to force their on-board thrusters to fire harder than usual to avoid a fiery atmospheric re-entry. "Unlike a Star Trek episode, this will probably not work, but it's worth a shot," Musk said.

The satellites' altitude is so shallow that Earth's gravity is pulling them 3 miles (5 km) closer toward the atmosphere with each orbit, SpaceX later said, confirming they would inevitably "re-enter Earth's atmosphere and fully demise." SpaceX said the second stage's failure occurred after engineers detected a leak of liquid oxygen, a propellant. The mishap occurred on Falcon 9's 354th mission. It was the first Falcon 9 failure since 2016, when a rocket exploded on a launch pad in Florida and destroyed its customer payload, an Israeli communications satellite. The failure "breaks a success streak of more than 300 straight missions," notes Reuters.

"We knew this incredible run had to come to an end at some point," Tom Mueller, SpaceX's former vice president of propulsion who designed Falcon 9's engines. "... The team will fix the problem and start the cycle again."

The world risks missing a goal to triple renewable energy capacity by 2030 as the current growth rate is inadequate, a report by the International Renewable Energy Agency (IRENA) showed on Thursday. From a report: A U.N. climate change conference in Dubai last year set a goal of tripling renewable energy capacity worldwide by 2030 to more than 11 terawatts (TW). Countries have to submit new or updated climate target commitments every five years after 2020 so next year they have to include revised ambitions for 2030. About 473 gigawatts (GW) of capacity was added last year, representing a 14% increase from the year before and the largest annual growth since 2000, IRENA said in a report. To meet the target, the world will have to add renewables capacity at a minimum 16.4% rate annually to 2030. However, if last year's 14% increase rate continues, the 11 TW target will be 1.5 TW short. Further reading: World Will Miss Target of Tripling Renewable Electricity Generation By 2030, IEA Says.

The western United States is experiencing an unprecedented heat wave, with multiple states breaking temperature records in recent weeks. Palm Springs, California has been particularly affected, shattering its all-time high temperature record when it reached 124F (51.1C) last Friday. The National Weather Service reported that Palm Springs hit 122F (50C) on July 8, the highest temperature ever recorded for that date.

This extreme heat is not isolated to Palm Springs, as Arizona, Oregon, and Nevada have also seen record-breaking temperatures. Climate scientists attribute this intensifying heat to human-caused climate change. The heat wave comes as global temperatures continue to rise. According to the European Union's Copernicus Climate Change Service, the world has been at or above the 1.5 degree Celsius threshold for 12 straight months as of June, a key marker in climate change discussions.

An anonymous reader shares a report: On Wednesday, Amazon claimed that it reached its goal of sourcing all its power from clean energy sources in the past year. If taken at face value, the announcement would mean it hit the milestone seven years ahead of schedule, which would be a monumental achievement. But environmental experts speaking to The New York Times, including a group of concerned Amazon employees, warn that the company is "misleading the public by distorting the truth." The company's claim of achieving 100 percent clean electricity is based in part on billion-dollar investments in over 500 solar and wind initiatives. The company's logic is that the energy these projects generate equals the electricity its data centers consume -- ergo, even Steven. But the renewable energy sources it uses for those calculations are fed into a general power grid, not exclusively into Amazon's operations. Environmental experts caution that the company is using "accounting and marketing to make itself look good," as The New York Times put it.

An anonymous reader quotes a report from The Guardian: Air pollution exposure can significantly decrease the chance of a live birth after IVF treatment, according to research that deepens concern about the health impacts of toxic air on fertility. Pollutant exposure has previously been linked to increased miscarriage rates and preterm births, and microscopic soot particles have been shown to travel through the bloodstream into the ovaries and the placenta. The latest work suggests that the impact of pollution begins before conception by disrupting the development of eggs. "We observed that the odds of having a baby after a frozen embryo transfer were more than a third lower for women who were exposed to the highest levels of particulate matter air pollution prior to egg collection, compared with those exposed to the lowest levels," said Dr Sebastian Leathersich, a fertility specialist and gynaecologist from Perth who is due to present the findings on Monday at the European Society of Human Reproduction and Embryology annual meeting in Amsterdam. [...]

The study analyzed fertility treatments in Perth over an eight-year period, including 3,659 frozen embryo transfers from 1,836 patients, and tracked whether outcomes were linked to the levels of fine particulate matter, known as PM10. The overall live birthrate was about 28% per transfer. However, the success rates varied in line with exposure to pollutants in the two weeks leading up to egg collection. The odds of a live birth decreased by 38% when comparing the highest quartile of exposure to the lowest quartile. "These findings suggest that pollution negatively affects the quality of the eggs, not just the early stages of pregnancy, which is a distinction that has not been previously reported," Leathersich said. The team now plan to study cells directly to understand why pollutants have a negative effect. Previous work has shown that the microscopic particles can damage DNA and cause inflammation in tissues. The report notes that the link between air pollution and live birth "was apparent despite excellent overall air quality during the study period, with PM10 and PM2.5 levels exceeding WHO guidelines on just 0.4% and 4.5% of the study days."

It adds: "Australia is one of just seven countries that met the WHO's guidelines in 2023, and this study is the latest to show evidence of harm even at relatively low levels of pollution."

The study has been published in the journal Human Reproduction.

The world has baked for 12 consecutive months in temperatures 1.5C (2.7F) greater than their average before the fossil fuel era, new data shows. Temperatures between July 2023 and June 2024 were the highest on record, scientists found, creating a year-long stretch in which the Earth was 1.64C hotter than in preindustrial times. From a report: The findings do not mean world leaders have already failed to honour their promises to stop the planet heating 1.5C by the end of the century -- a target that is measured in decadal averages rather than single years -- but that scorching heat will have exposed more people to violent weather. A sustained rise in temperatures above this level also increases the risk of uncertain but catastrophic tipping points.

Carlo Buontempo, director of the Copernicus Climate Change Service, which analysed the data, said the results were not a statistical oddity but a "large and continuing shift" in the climate. "Even if this specific streak of extremes ends at some point, we are bound to see new records being broken as the climate continues to warm," he said. "This is inevitable unless we stop adding greenhouse gases into the atmosphere and the oceans." Copernicus, a scientific organisation that belongs to the EU's space programme, uses billions of measurements from satellites, ships, aircraft and weather stations to track key climate metrics. It found June 2024 was hotter than any other June on record and was the 12th month in a row with temperatures 1.5C greater than their average between 1850 and 1900. Because temperatures in some months had "relatively small margins" above 1.5C, the scientists said, datasets from other climate agencies may not confirm the 12-month temperature streak.

They lived 378 days in a "mock Mars habitat" in Houston, reports Engadget. But today the four volunteers for NASA's yearlong simulation will finally emerge from their 1,700-square-foot habitat at the Johnson Space Center that was 3D-printed from materials that could be created with Martian soil.

And you can watch the "welcome home" ceremony's livestream starting at 5 p.m. EST on NASA TV (also embedded in Engadget's story). More det ails from NASA: For more than a year, the crew simulated Mars mission operations, including "Marswalks," grew and harvested several vegetables to supplement their shelf-stable food, maintained their equipment and habitat, and operated under additional stressors a Mars crew will experience, including communication delays with Earth, resource limitations, and isolation.
One of the mission's crew members told the Houston Chronicle they were "very excited to go back to 'Earth,' but of course there is a bittersweet aspect to it just like any time you reach the completion of something that has dominated one's life for several years."

Various crew members left behind their children or long-term partner for this once-in-a-lifetime experience, according to an earlier article, which also notes that NASA is paying the participants $10 per hour "for all waking hours, up to 16 hours per day. That's as much as $60,480 for the 378-day mission."

Engadget points out there are already plans for two more one-year "missions" — with the second one expected to begin next spring...

I'm curious. Would any Slashdot readers be willing to spend a year in a mock Mars habitat?

General Motors will pay nearly $146 million in penalties to the U.S. government, reports the Associated Press, "because 5.9 million of its older vehicles do not comply with emissions and fuel economy standards." The National Highway Traffic Safety Administration said in a statement Wednesday that certain GM vehicles from the 2012 through 2018 model years did not comply with federal fuel economy requirements. The penalty comes after the Environmental Protection Agency said its testing showed the GM pickup trucks and SUVs emit over 10% more carbon dioxide on average than GM's initial compliance testing claimed.

The EPA says the vehicles will remain on the road and cannot be repaired. The GM vehicles on average consume at least 10% more fuel than the window sticker numbers say, but the company won't be required to reduce the miles per gallon on the stickers, the EPA said... GM said in a statement that it complied with all regulations in pollution and mileage certification of its vehicles. The company said it is not admitting to any wrongdoing nor that it failed to comply with the Clean Air Act...

The enforcement action involves about 4.6 million full-size pickups and SUVs and about 1.3 million midsize SUVs, the EPA said. The affected models include the Chevy Tahoe, Cadillac Escalade and Chevy Silverado. About 40 variations of GM vehicles are covered. GM will be forced to give up credits used to ensure that manufacturers' greenhouse gas emissions are below the fleet standard for emissions that applies for that model year, the EPA said. In a quarterly filing with the Securities and Exchange Commission, GM said it expects the total cost to resolve the matter will be $490 million. Because GM agreed to address the excess emissions, EPA said it was not necessary to make a formal determination regarding the reasons for the excess pollution.
According to the article, David Cooke, senior vehicles analyst for the Union of Concerned Scientists, "said it's possible that GM owners could sue the company because they are getting lower gas mileage than advertised."

The article also notes that in 2014, Hyundai and Kia "entered into a settlement in which they had to pay a $100 million civil penalty to end a two year investigation into overstated gas mileage on window stickers of 1.2 million vehicles."

Longtime Slashdot reader Baron_Yam shares a report from Phys.Org, with the caption: "It's not sequestration, but it is a closed carbon loop and can store energy from renewable sources to be released when they are not collecting energy." From the report: Carbon in the atmosphere is a major driver of climate change. Now researchers from McGill University have designed a new catalyst for converting carbon dioxide (CO2) into methane -- a cleaner source of energy -- using tiny bits of copper called nanoclusters. While the traditional method of producing methane from fossil fuels introduces more CO2 into the atmosphere, the new process, electrocatalysis, does not. "On sunny days you can use solar power, or when it's a windy day you can use that wind to produce renewable electricity, but as soon as you produce that electricity you need to use it," says Mahdi Salehi, Ph.D. candidate at the Electrocatalysis Lab at McGill University. "But in our case, we can use that renewable but intermittent electricity to store the energy in chemicals like methane."

By using copper nanoclusters, says Salehi, carbon dioxide from the atmosphere can be transformed into methane and once the methane is used, any carbon dioxide released can be captured and "recycled" back into methane. This would create a closed "carbon loop" that does not emit new carbon dioxide into the atmosphere. The research, published recently in the journal Applied Catalysis B: Environment and Energy, was enabled by the Canadian Light Source (CLS) at the University of Saskatchewan (USask). The team plans to continue refining their catalyst to make it more efficient and investigate its large-scale, industrial applications. Their hope is that their findings will open new avenues for producing clean, sustainable energy.

An anonymous reader quotes a report from CNN: Deep inside Earth is a solid metal ball that rotates independently of our spinning planet, like a top whirling around inside a bigger top, shrouded in mystery. This inner core has intrigued researchers since its discovery by Danish seismologist Inge Lehmann in 1936, and how it moves -- its rotation speed and direction -- has been at the center of a decades-long debate. A growing body of evidence suggests the core's spin has changed dramatically in recent years, but scientists have remained divided over what exactly is happening -- and what it means. Part of the trouble is that Earth's deep interior is impossible to observe or sample directly. Seismologists have gleaned information about the inner core's motion by examining how waves from large earthquakes that ping this area behave. Variations between waves of similar strengths that passed through the core at different times enabled scientists to measure changes in the inner core's position and calculate its spin.

"Differential rotation of the inner core was proposed as a phenomenon in the 1970s and '80s, but it wasn't until the '90s that seismological evidence was published," said Dr. Lauren Waszek, a senior lecturer of physical sciences at James Cook University in Australia. But researchers argued over how to interpret these findings, "primarily due to the challenge of making detailed observations of the inner core, due to its remoteness and limited available data," Waszek said. As a result, "studies which followed over the next years and decades disagree on the rate of rotation, and also its direction with respect to the mantle," she added. Some analyses even proposed that the core didn't rotate at all.

One promising model proposed in 2023 described an inner core that in the past had spun faster than Earth itself, but was now spinning slower. For a while, the scientists reported, the core's rotation matched Earth's spin. Then it slowed even more, until the core was moving backward relative to the fluid layers around it. At the time, some experts cautioned that more data was needed to bolster this conclusion, and now another team of scientists has delivered compelling new evidence for this hypothesis about the inner core's rotation rate. Research published June 12 in the journal Nature not only confirms the core slowdown, it supports the 2023 proposal that this core deceleration is part of a decades-long pattern of slowing down and speeding up. The new findings also confirm that the changes in rotational speed follow a 70-year cycle, said study coauthor Dr. John Vidale, Dean's Professor of Earth Sciences at the University of Southern California's Dornsife College of Letters, Arts and Sciences.

No leap second will be added to universal time in 2024, the International Earth Rotation and Reference Systems Service (IERS) has announced. From a report: An additional second has previously been added to the universal time as displayed by atomic clocks (UTC) when this measurement has become out of sync with the rotation of the Earth (UT1).

But in a statement released on Thursday, the IERS, which enacts changes to UTC on behalf of the International Telecommunications Union (ITU), said the difference between UTC and UT1 is not great enough to warrant a change. Changes in the relationship between UTC and UT1 sometimes occur because the Earth does not always spin at the same speed, with natural events such as earthquakes often causing small changes.

Paul Voosen reports via Science Magazine: Few things prompt as much anxiety in science and the wider world as the growing use of artificial intelligence (AI) and the rising influence of China. This spring, these two factors created a rift at the European Geosciences Union (EGU), one of the world's largest geoscience societies, that led to the firing of its president. The whole episode has been "a packaging up of fear of AI and fear of China," says Michael Stephenson, former chief geologist of the United Kingdom and one of the founders of Deep-time Digital Earth (DDE), a $70 million effort to connect digital geoscience databases. In 2019, another geoscience society, the International Union of Geological Sciences (IUGS), kicked off DDE, which has been funded almost entirely by the government of China's Jiangsu province.

The dispute pivots on GeoGPT, an AI-powered chatbot that is one of DDE's main efforts. It is being developed by Jian Wang, chief technology officer of e-commerce giant Alibaba. Built on Qwen, Alibaba's own chatbot, and fine-tuned on billions of words from open-source geology studies and data sets, GeoGPT is meant to provide expert answers to questions, summarize documents, and create visualizations. Stephenson tested an early version, asking it about the challenges of using the fossilized teeth of conodonts, an ancient relative of fish, to define the start of the Permian period 299 million years ago. "It was very good at that," he says. As awareness of GeoGPT spread, so did concern. Paul Cleverly, a visiting professor at Robert Gordon University, gained access to an early version and said in a recent editorial in Geoscientist there were "serious issues around a lack of transparency, state censorship, and potential copyright infringement." Paul Cleverly and GeoScienceWorld CEO Phoebe McMellon raised these concerns in a letter to IUGS, arguing that the chatbot was built using unlicensed literature without proper citations. However, they did not cite specific copyright violations, so DDE President Chengshan Wang, a geologist at the China University of Geosciences, decided not to end the project.

Tensions at EGU escalated when a complaint about GeoGPT's transparency was submitted before the EGU's April meeting, where GeoGPT would be introduced. "It arrived at an EGU whose leadership was already under strain," notes Science. The complaint exacerbated existing leadership issues within EGU, particularly surrounding President Irina Artemieva, who was seen as problematic by some executives due to her affiliations and actions. Science notes that she's "affiliated with Germany's GEOMAR Helmholtz Centre for Ocean Research Kiel but is also paid by the Chinese Academy of Geological Sciences to advise it on its geophysical research."

Artemieva forwarded the complaint via email to the DDE President to get his view, but forgot to delete the name attached to it, leading to a breach of confidentiality. This incident, among other leadership disputes, culminated in her dismissal and the elevation of Peter van der Beek to president. During the DDE session at the EGU meeting, van der Beek's enforcement actions against Chinese scientists and session attendees led to allegations of "harassment and discrimination."

"Seeking to broker a peace deal around GeoGPT," IUGS's president and another former EGU president, John Ludden, organized a workshop and invited all parties to discuss GeoGPT's governance, ongoing negotiations for licensing deals and alternative AI models for GeoGPT's use.

Ars Technica's Eric Berger writes: On the day before Christmas last year, a Falcon 9 rocket launched from California and put two spy satellites into low-Earth orbit for the armed forces of Germany, which are collectively called the Bundeswehr. Initially, the mission appeared successful. The German satellite manufacturer, OHB, declared that the two satellites were "safely in orbit." The addition of the two SARah satellites completed a next-generation constellation of three reconnaissance satellites, the company said. However, six months later, the two satellites have yet to become operational. According to the German publication Der Spiegel, the antennas on the satellites cannot be unfolded. Engineers with OHB have tried to resolve the issue by resetting the flight software, performing maneuvers to vibrate or shake the antennas loose, and more to no avail. As a result, last week, German lawmakers were informed that the two new satellites will probably not go into operation as planned.

The three-satellite constellation known as SARah -- the SAR is a reference to the synthetic aperture radar capability of the satellites -- was ordered in 2013 at a cost of $800 million. The first of the three satellites, SARah 1, launched in June 2022 on a Falcon 9 rocket. This satellite was built by Airbus in southern Germany, and it has since gone into operation without any problems. The two smaller satellites built by OHB, flying with passive synthetic aperture radar reflectors, were intended to complement the SARah 1 satellite, which carries an active phased-array radar antenna. [...] According to the Der Spiegel report, the Bundeswehr says the two SARah satellites built by OHB remain the property of the German company and would only be turned over to the military once they were operational. As a result, the military says OHB will be responsible for building two replacement satellites. Shockingly, the German publication says that its sources indicated OBH did not fully test the functionality and deployment of the satellite antennas on the ground. This could not be confirmed.

Canned water distilled from the air will be available to buy in the US later this year, in an effort to promote solar-powered "hydropanels" that provide an off-grid method of producing drinking water. New Scientist adds: The panels, created by Arizona-based firm Source, use solar energy to power fans, which draw water vapour from the air. A water-absorbing substance, known as a desiccant, traps the moisture, before solar energy from the panel releases the moisture into a collection area within the panel. The distilled water is then sent to a pressurised tank, where the pH is tweaked and minerals like calcium and magnesium are added.

Each panel can produce up to 3 litres of drinking water water a day, about the average daily intake for one person. The process works effectively even in hot, arid conditions such as Arizona, says Friesen. Source, which launched in 2014 as Zero Mass Water, already has hydropanels installed in 56 countries around the world. The panels can be installed as ground arrays, or on rooftops, linked into a building's drinking water pipes. Many sites serve off-grid communities without easy access to potable water, says Friesen. Most of the panels, which retail at almost $3000 apiece, are purchased by governments or development banks, although households can also install panels privately.

Starting July 1st, ships in Arctic waters are banned from using Heavy Fuel Oil (HFO), a relatively cheap tar-like oil that's widely used in shipping around the world, especially tankers. According to the BBC, it's the "dirtiest and most climate-damaging fuel for ships." Still, campaigners believe numerous loopholes will allow most ships to continue using the fuel until 2029, limiting the ban's immediate effectiveness. The BBC reports: Produced from the waste left over in oil refining, HFO poses a huge threat to the oceans in general but to the Arctic in particular. This sludge-like fuel is almost impossible to clean up if a spill occurs. In colder waters, experts say, the fuel does not break down but sinks in lumps that linger in sediments, threatening fragile ecosystems. In climate terms, this oil is seen as particularly dangerous, not just producing large amounts of planet-warming gas when burned, but also spewing out sooty particles called black carbon. [...] The oil was banned from use or transport in the Antarctic in 2011. Environmentalists have been pushing to expand that restriction to northern waters for years, finally persuading the countries that participate in the International Maritime Organisation (IMO) to enact a ban back in 2021. [...]

According to the regulations, ships that have a "protected fuel tank" will be exempt from the ban. Countries that border the Arctic will also be able to exempt their own ships from the ban in their own territorial waters. One of the major players in the region is Russia, which has over 800 ships operating in northern waters. They are not implementing the new IMO regulation. These waiver exemptions will last until 2029 -- their impact is likely to be significant, with the International Council on Clean Transportation estimating that about 74% of ships that use HFO will be able to continue to do so. Some observers believe that increased efforts to extract oil in the Arctic could see a rise in the amount of HFO in use in these waters, instead of a decrease.

The Los Angeles Times reports that "multiple projects seeking to remove carbon dioxide from the air have been launched across Los Angeles County: When completed, Project Monarch and its wastewater component, Pure Water Antelope Valley, will purify up to 4.5 million gallons of water each day and capture 25,000 tons of atmospheric CO2 each year. (The typical gasoline-powered automobile spews 4.6 tons of carbon each year, according to the Environmental Protection Agency).... But the Palmdale project isn't the only new carbon-capture development in L.A. County. On Friday, officials from CarbonCapture Inc. gathered in Long Beach to introduce the first commercial-scale U.S. direct air capture, or DAC, system designed for mass production. The unit, which resembles a shipping container, can remove more than 500 tons of atmospheric CO2 per year... The L.A.-based company also announced that it will mass-produce up to 4,000 of its DAC modules annually at a new facility in Mesa, Arizona. It joins similar efforts from L.A.-based Captura, which is working to remove CO2 from the upper ocean; L.A.-based Avnos, which produces water while capturing carbon; and L.A.-based Equatic, which is working to remove atmospheric CO2 using the ocean...

[Equatic's] San Pedro facility pumps seawater through a series of electric plates that separate the water into hydrogen and oxygen as well as acidic and alkaline streams of liquid. The alkaline, or base, stream is exposed to the atmosphere, where it mineralizes CO2 into carbonates that are then dissolved and discharged back into the ocean for permanent storage, operators say Additionally, the hydrogen produced by the process is carbon-negative, making it a source of renewable energy that can be used to fuel the CO2 removal process or sold to other users, said Edward Sanders, chief operating officer at Equatic.

Equatic announced this month that it will partner with a Canadian carbon removal project developer, Deep Sky, to build North America's first commercial-scale ocean-based CO2 removal plant in Quebec, following the success of its effort in Los Angeles as well as another facility in Singapore. While the San Pedro facility can capture about 40 tons of CO2 per year, the Quebec facility will capture about 100,000 tons per year, Sanders said.
Meanwhile, two new projects by direct air capture company Heirloom were announced this week in Louisiana. Those projects are "expected to remove hundreds of thousands of tons of carbon dioxide from the air per year," according to the Associated Press, "and store it deep underground... part of "a slew of carbon removal and storage projects that have been announced in Louisiana." Heirloom estimates that they will eventually remove 320,000 tons of carbon dioxide each year... The company uses limestone, a natural absorbent, to extract carbon dioxide from the air. Heirloom's technology reduces the time it takes to absorb carbon dioxide in nature from years to just three days, according to the company's press release. The carbon dioxide is then removed from the limestone material and stored permanently underground.
In May America's Energy department also announced $3.5 billion in funding for its carbon-capture program — four large-scale, regional direct air capture hubs "that each comprise a network of carbon dioxide removal projects..." The hubs will have the capacity to capture and then permanently store at least one million metric tons of CO2 from the atmosphere annually, either from a single unit or from multiple interconnected units.
And Shell Canada has a pair of carbon capture projects in Alberta it expects to have operational toward the end of 2028, according to the CBC: The Polaris project is designed to capture about 650,000 tonnes of carbon dioxide annually from the Scotford complex. That works out to approximately 40 per cent of Scotford's direct CO2 emissions from the refinery and 22 per cent of its emissions from the chemicals complex.

game of Asteroids An anonymous reader shared this report from The Hill: An asteroid the size of a football stadium threaded the needle between Earth and the moon Saturday morning — the second of two astronomical near misses in three days. Near miss, in this case, is a relative term: Saturday's asteroid, 2024 MK, came within 180,000 miles of Earth. On Thursday, meanwhile, asteroid 2011 UL21 flew within 4 million miles.

But the Saturday passage of 2024 MK — which scientists discovered only two weeks ago — coincides with a sobering reminder of threats from space. Sunday is Asteroid Day, the anniversary of the 1908 explosion of a rock from space above a Russian town — the sort of danger that, astronomers warn, is always lurking as the Earth hurtles through space... In 2013, for instance, an asteroid about 62 feet across that broke apart nearly 20 miles above Siberia released 30 times as much energy as the atomic bomb that hit Hiroshima. While most of the impact energy was absorbed by the atmosphere, the detonation triggered a shock wave that blew out windows and injured more than a thousand people.
The article points out that if Saturday's asteroid had hit earth, the impact would have "the equivalent impact energy in the hundreds of megaton approaching a gigaton," Peter Brown of Canada's Western University told the Canadian Broadcasting Service. (For comparison, most hydrogen bombs are in the 50-megaton range.) Brown said "It's the sort of thing that if it hit the east coast of the U.S., you would have catastrophic effects over most of the eastern seaboard. But it's not big enough to affect the whole world."

Meanwhile, the article adds that last Thursday's asteroid — "while it was comfortably far out in space" — was the size of Mt. Everest. "At 1.5 miles in diameter, that asteroid was about a quarter the size of the asteroid that struck the earth 65 million years ago, wiping out all dinosaurs that walked, as well as the majority of life on earth." But the risk of a collision like that "is very, very low." NASA has estimated that a civilization-ending event (like the collision of an asteroid the size of Thursday's with the Earth) should only happen every few million years. And such an impact from an asteroid half a mile in diameter or bigger will be almost impossible for a very long time, according to findings published last year in The Astronomical Journal.
NASA's catalog of large and dangerous objects like 2011 UL21 is now 95 percent complete, MIT Technology Review reported.

Commercial space efforts continue around the world, as the Chinese company Space Pioneer fired up a partially-fueled rocket engine Sunday for a short-duration test of its reusable rocket on the ground. But Space News reports that the test "ended in catastrophic failure and a dramatic explosion."

"Amateur footage captured by Gongyi citizens and posted on Chinese social media shows the nine-engine test stage igntiing and then, exceptionally, taking off." Hold-down clamps and other structures are typically used to securely keep stages in place. The stage is seen climbing into the sky before halting, apparently with its engines shutting off, and returning to Earth. The stage impacted the ground around 50 seconds after it took off, apparently with much of its kerosene-liquid oxygen propellant remaining, causing a large explosion.

The Tianlong-3 first stage would likely fire for a number of minutes on an orbital flight. Space Pioneer was conducting its test as a buildup to an orbital launch of the Tianlong-3, which is benchmarked against the SpaceX Falcon 9, in the coming months. The company announced earlier this month that it has secured $207 million in new funding.

Shanghai-based digital newspaper The Paper reported Henan officials as saying there were no casualties reported. Space Pioneer issued its own statement later, stating there was a structural failure at the connection between the rocket body and the test bench. The rocket's onboard computer automatically shut down the engines and the rocket fell 1.5 kilometers southwest. It reiterated earlier reports that no casualties were found. The company said the test produced 820 tons of thrust.
The article speculates on whether the event will delay the development of the rocket — or the planned launches for a Chinese megaconstellation of satellites. "Space Pioneer says it will conduct an analysis and restart testing with new hardware as soon as possible."