Can carbon-reducing projects "offset" a company's emissions? "The reality has been less encouraging," according to a Science magazine editorial by Cary Coglianese, a law/political science professor at University of Pennsylvania, and Cynthia Giles, a former senior advisor at the U.S. Environmental Protection Agency. In a new paper published Wednesday, they found that more than half of all currently-certified carbon auditors signed off on projects later found to be "overclaiming" carbon benefits.

Their conclusion? "Criticism should be directed not at individual auditors as much as the structure of the system that fosters these outcomes." Most carbon offset projects that have been closely scrutinized — including projects for forest protection, renewable energy, and methane-reducing methods of rice cultivation — have greatly exaggerated their climate benefits. More than 80% of issued credits might not reflect real emission reductions. This has alarmed potential offset purchasers and stalled carbon offset markets.

Efforts to resuscitate the beleaguered offset market tout third-party auditing as "essential" to ensuring credit integrity. That reliance is misplaced... [E]xtensive research from many contexts shows that auditors selected and paid by audited organizations often produce results skewed toward those entities' interests. A field experiment in India, for example, found that air and water pollution auditors who were randomly assigned and paid from a central fund reported emissions at levels 50 to 70% higher than auditors selected and paid by audited firms. Auditors — like all people — are subject to a well-established and largely unconscious cognitive phenomenon of self-serving bias, causing them to interpret evidence in favor of their clients...

[A]uditors have been required all along and have failed to prevent substantial credit overclaiming. It is rarely acknowledged that all of the credit overclaiming projects that have stirred so much controversy were ratified by third-party auditors under the same auditor selection and payment system that offset advocates rely on today... Auditors are unlikely to stay in business if they disapprove credits at the high rates that research suggests would be appropriate today...

Given the high planetary stakes in carbon policy choices being made now, it is past time to recognize that third-party auditors selected and paid by the audited organizations are not the bulwark for credit integrity they are claimed to be.

An underwater turbine has been spinning for more than six years "to harness the power of ocean tides for electricity," reports the Associated Press. The long-running turbine (off the coast of Scotland) has now proven the commercial viability of the technology: Keeping a large, or grid-scale, turbine in place in the harsh sea environment that long is a record that helps pave the way for bigger tidal energy farms and makes it far more appealing to investors, according to the trade association Ocean Energy Europe. Tidal energy projects would be prohibitively expensive if the turbines had to be taken out of the water for maintenance every couple of years.

Tidal energy technologies are still in the early days of their commercial development, but their potential for generating clean energy is big. According to the National Renewable Energy Laboratory, marine energy, a term researchers use to refer to power generated from tides, currents, waves or temperature changes, is the world's largest untapped renewable energy resource.
This long-running tidal energy project off the coast of Scotland has four 1.5-megawatt turbines — enough to power 7,000 homes for a year, according to the article. But they plan to add 20 turbines in 2030 ("after needed upgrades to the electricity grid are finished"), and the site "could eventually hold as many as 130 turbines that are more powerful than those at the site today."

Thanks to Slashdot reader Bruce66423 for sharing the news.

An anonymous reader shared this report from Cosmos magazine about a plan to "pick up those faint signals from billions of years ago." Astronomers are planning to launch a tiny spacecraft to the far side of the Moon to listen out for "ancient whispers" in a quest to uncover the secrets of the early universe. The mission will focus on understanding the 'Cosmic Dawn', a period in the early stages of the universe after the Big Bang but before the first stars and galaxies appeared.

One of the difficulties in studying this period of the universe is that silence is essential. With all the electronics and interference in our atmosphere, Earth becomes too loud, making it unsuitable for this kind of research... The proposed mission will utilise the Moon as a giant shield, blocking out the noise from Earth, in order to observe these signals...

The mission, known as CosmoCube, is a joint study between the UK's University of Portsmouth, University of Cambridge and Rutherford Appleton Laboratory Space... CosmoCube's radio will operate at low frequencies (10-100MHz), which should hopefully be able to detect extremely faint signals. The team hope to reach lunar orbit before the end of the decade, with a roughly 5-year roadmap planned.
The article includes this quote from Professor David Bacon, from the University of Portsmouth and CosmoCube researcher. "It's incredible how far these radio waves have travelled, now arriving with news of the universe's history.

"The next step is to go to the quieter side of the Moon to hear that news."

China "accounts for more than half of global coal use," reports Asia Times, "even as it builds the world's largest solar-panel and EV industries." Much of the world's solar gear is made on fossil power. The International Energy Agency finds that "coal generates over 60% of the electricity used for global solar PV manufacturing," far above coal's ~36% share of typical grids. That is because over 80% of PV factories sit in Chinese provinces like Xinjiang and Jiangsu, where coal dominates the grid.

China has poured over $50 billion into solar factories since 2011, roughly ten times Europe's investment, cutting panel costs by about 80% and fueling a worldwide solar boom. But those panels were produced on coal. In one analysis, they repay their manufacturing CO2 in only months, meaning the emissions were dumped up-front in China's coal plants. Any major disruption to China's coal power or factories (from grid shocks to trade barriers) could thus send ripples through the global PV market.

China's coal and heavy industries also feed its clean-tech supply chain. Coal-fired steel mills supply the aluminum and metal parts for EVs and panels, and coal chemicals provide battery precursors and silicon for solar... At the same time, Chinese oil and gas giants (CNPC, Sinopec) have set up solar, wind and battery divisions, redirecting fossil profits into green ventures.
Another interesting statistic from the article: "In Thailand, Asia's long-time auto hub, Chinese EV brands now command more than 70% of EV sales."

Thanks to Slashdot reader RossCWilliams for sharing the news.

An anonymous reader shares a report: This week has seen the shortest days of the year so far. According to data from the U.S. Naval Observatory and the International Earth Rotation and Reference Systems Service, Tuesday's rotation was about 1.34 milliseconds less than 24 hours. More quick spins are expected this week, later this month and in early August, according to predictions from the website Time and Date.

This isn't completely out of the ordinary: Our world's spins have been faster than usual lately. The average day has mostly shortened over the past decade, and within the past five years or so, the full rotation has clocked in at a hair less than 24 hours more often than not. Factors driving the change include movements at Earth's core, atmospheric changes and the moon's position.

But long-term trends do not suggest that the days will shorten in perpetuity. In fact, it is just the opposite. For many millenniums, the days have been growing longer. A Tyrannosaurus rex that lived 70 million years ago would have experienced an average daily rotation of about 23 1/2 hours, studies have found.

Four years of research following the 2021 western North American heat wave has revealed both the meteorological conditions that fuel extreme temperatures and evidence that heat has physical limits. The 2021 event "shocked everyone, including specialists working on the subject. People were completely stunned," said Robin Noyelle, a postdoctoral researcher in climate science at ETH Zurich.

Scientists now focus on temperature departures from local averages rather than absolute readings. The most anomalously warm temperature was recorded in Antarctica, where temperatures rose 39C above average in March 2022. North Pole temperatures surged 20C higher than normal in February, reaching the melting point in winter.

Research has identified five key factors that enable extreme heat: cloudless skies, high pressure, dark surfaces, lower altitudes, and lack of water. "Basically all of these conditions are met in Death Valley, but not in many other places in the world," said climate scientist Friederike Otto. Scientists insist that there are heat limits, though these upper bounds will rise with global warming, they caution.

Almost three-quarters of all solar and wind power projects being built globally are in China, says a new report that highlights the country's rapid expansion of renewable energy sources. From a report: China is building 510 gigawatts of utility-scale solar and wind projects, according to data from the Global Energy Monitor, a non-governmental organisation based in San Francisco. That compares with about 689GW under construction globally, GEM said.

A rough rule of thumb is that a gigawatt can potentially supply electricity for about 1mn homes. "China is [...] leading the world in global renewable energy build-out," the report said. "It continues to add solar and wind power at a record pace." China's expansion of clean energy sources is important for efforts to fight climate change, given the country's dominant role in global manufacturing.

Researchers have discovered 27 million tonnes of nanoplastics distributed across just the top layer of the temperate to subtropical North Atlantic Ocean, according to a study published in Nature. The team sampled water at three depths across 12 locations during a November 2020 research cruise, finding average concentrations of 18 milligrams per cubic meter of three plastic types: polyethylene terephthalate, polystyrene and polyvinylchloride.

These particles, smaller than one micrometer in diameter, behave differently from larger microplastics by remaining suspended throughout the water column rather than settling to the ocean floor. The nanoplastics can pass through cell walls and enter the marine food web through phytoplankton, said Tony Walker, an environmental scientist at Dalhousie University. The world's oceans contain an estimated 3 million tonnes of floating plastic pollution when excluding nanoplastics.

Western Europe sweltered through its hottest June on record last month, as "extreme" temperatures blasted the region in punishing back-to-back heatwaves, the EU climate monitor Copernicus said Wednesday. From a report: Globally, this past June was the third warmest on record, continuing a blistering heat streak in recent years as the planet warms as a result of humanity's emissions of greenhouse gases. The previous hottest June was in 2024 and the second hottest was in 2023, the Copernicus Climate Change Service (C3S) said. Sweltering extremes were particularly pronounced in Europe, which is warming several times faster than the global average.

Two Chinese satellites, SJ-25 and SJ-21, have reportedly completed the first autonomous high-altitude orbital docking. "Although unconfirmed, this is thought to be the first orbital refueling at such a height -- the two satellites are currently over 20,000 miles from Earth," reports ExtremeTech. From the report: Orbital refueling is an important component in keeping satellites and space stations in low Earth orbit flying, but any efforts beyond that have been merely speculative until the past few years, when serious efforts from a range of private and national entities have explored its possibilities. China may have gotten ahead of the curve with this latest docking, though, in an impressive world first that raises serious concerns for satellites from nations and entities that align themselves differently from China's goals and ambitions.

In January, a satellite designated SJ-25 was launched "for the verification of satellite fuel replenishment and life extension service technologies," according to the Chinese state-owned designer, Shanghai Academy of Spaceflight Technology (via Ars Technica). Sometime last week, it matched orbits with the SJ-21 satellite, which previously conducted space debris maneuvering tests in 2021 and has remained in a geosynchronous orbit ever since.

Last week, the two satellites matched orbits and seemingly docked together. Analysts believe the newer SJ-25 has likely proven refueling is possible even for geosynchronous satellites without the need for a manned crew to facilitate it. In an effort to prove this, two US Space Force's inspector satellites have positioned themselves in closer orbits to SJ-25 and SJ-21 for improved optics. [...] China continues to suggest these missions are part of a debris clean-up program, though it hasn't publicly made any statements about the recent alleged docking and refueling to celebrate its successes. If it doesn't, the only way we'll know if a refueling maneuver was successful is if the SJ-21 satellite unshackles from its younger sibling and performs fuel-demanding maneuvers that its previously estimated fuel levels shouldn't allow for.

The U.N. Human Rights Council passed a motion on climate change and human rights by consensus Tuesday after the Marshall Islands withdrew a divisive amendment calling for states to recommit to a fossil fuel phase-out. The motion calls on countries "to contribute to the global efforts" against climate change and follows the council's 2021 recognition of access to a clean and healthy environment as a fundamental right.

Oil-producing countries including Saudi Arabia and Kuwait had voiced opposition to the original fossil fuel phrasing during negotiations. Instead, the final motion referenced "the imperative of defossilizing our economies" in a footnote, allowing passage without a vote where the outcome had been uncertain.

An anonymous reader quotes a report from The Guardian: The herbicide ingredient used to replace glyphosate in Roundup and other weedkiller products can kill gut bacteria and damage organs in multiple ways, new research shows. The ingredient, diquat, is widely employed in the US as a weedkiller in vineyards and orchards, and is increasingly sprayed elsewhere as the use of controversial herbicide substances such as glyphosate and paraquat drops in the US. But the new piece of data suggests diquat is more toxic than glyphosate, and the substance is banned over its risks in the UK, EU, China and many other countries. Still, the EPA has resisted calls for a ban, and Roundup formulas with the ingredient hit the shelves last year. [...]

Diquat is also thought to be a neurotoxin, carcinogen and linked to Parkinson's disease. An October analysis of EPA data by the Friends of the Earth non-profit found it is about 200 times more toxic than glyphosate in terms of chronic exposure. [...] The new review of scientific literature in part focuses on the multiple ways in which diquat damages organs and gut bacteria, including by reducing the level of proteins that are key pieces of the gut lining. The weakening can allow toxins and pathogens to move from the stomach into the bloodstream, and trigger inflammation in the intestines and throughout the body. Meanwhile, diquat can inhibit the production of beneficial bacteria that maintain the gut lining. Damage to the lining also inhibits the absorption of nutrients and energy metabolism, the authors said.

The research further scrutinizes how the substance harms the kidneys, lungs and liver. Diquat "causes irreversible structural and functional damage to the kidneys" because it can destroy kidney cells' membranes and interfere with cell signals. The effects on the liver are similar, and the ingredient causes the production of proteins that inflame the organ. Meanwhile, it seems to attack the lungs by triggering inflammation that damages the organ's tissue. More broadly, the inflammation caused by diquat may cause multiple organ dysfunction syndrome, a scenario in which organ systems begin to fail. The authors note that many of the studies are on rodents and more research on low, long-term exposure is needed. The report notes that the EPA is not reviewing the chemical, "and even non-profits that push for tighter pesticide regulations have largely focused their attention elsewhere."

"[T]hat was in part because U.S. pesticide regulations are so weak that advocates are tied up with battles over ingredients like glyphosate, paraquat and chlorpyrifos -- substances that are banned elsewhere but still widely used here. Diquat is 'overshadowed' by those ingredients."

Leaders of the BRICS group of developing nations addressed the shared challenges of global warming on Monday, the final day of their summit in Rio de Janeiro, demanding that wealthy nations fund mitigation of greenhouse gas emissions in poorer nations. From a report: In his opening remarks, Brazilian President Luiz Inacio Lula da Silva, who will host the United Nations climate summit in November, also blasted denialism of the climate emergency, indirectly criticizing U.S. President Donald Trump's decision to pull his country out of the 2015 Paris Agreement.

"Today, denialism and unilateralism are eroding past achievements and harming our future," he said. "The Global South is in a position to lead a new development paradigm without repeating the mistakes of the past." Trump took issue on Sunday with veiled criticism from the BRICS group, accusing the bloc of having "anti-American policies" and threatening them with extra 10% tariffs.

The European Union is holding back on signing a joint climate action pledge with China at a summit this month to mark a half-century of diplomatic ties, a top climate official told the Financial Times in remarks published on Monday. Reuters: The EU's climate targets are among the world's most ambitious, but they have been based entirely on domestic emissions cuts. Now the bloc faces a mid-September deadline to submit a new 2035 climate target to the United Nations.

Brussels has refused Beijing's repeated requests for a mutual climate commitment after the summit of the world's second- and third-largest economies, unless China promises to do more to cut greenhouse gas emissions, EU officials said. "There is only merit in having a declaration from our perspective if there are also content nuts to be cracked and ambition to be displayed," Climate Commissioner Wopke Hoekstra told the paper.

Three space probes are leaving our solar system — yet are still functioning. After the two Voyager space probes, New Horizons "was launched in 2006, initially to study Pluto," remembers New Scientist. But "it has since travelled way beyond this point, ploughing on through the Kuiper belt, a vast, wide band of rocks and dust billions of miles from the sun. It is now speeding at tens of thousands of kilometres per hour..."

And it's just performed the first ever example of interstellar navigation... As it hurtles out of our solar system, NASA's New Horizons spacecraft is so far from Earth that the stars in the Milky Way appear in markedly different positions compared with our own view... due to the parallax effect. This was demonstrated in 2020 when the probe beamed back pictures of two nearby stars, Proxima Centauri and Wolf 359, to Earth.

Now, Tod Lauer at the US National Optical-Infrared Astronomy Research Laboratory in Arizona and his colleagues have used this effect to work out the position of New Horizons... Almost all spacecraft calculate their bearings to within tens of metres using NASA's Deep Space Network, a collection of radio transmitters on Earth that send regular signals out to space. In comparison, the parallax method was far less accurate, locating New Horizons within a sphere with a radius of 60 million kilometres, about half the distance between Earth and the sun. "We're not going to put the Deep Space Network out of business — this is only a demo proof of concept," says Lauer. However, with a better camera and equipment they could improve the accuracy by up to 100 times, he says.

Using this technique for interstellar navigation could offer advantages over the DSN because it could give more accurate location readings as a spacecraft gets further away from Earth, as well as being able to operate autonomously without needing to wait for a radio signal to come from our solar system, says Massimiliano Vasile at the University of Strathclyde, UK. "If you travel to an actual star, we are talking about light years," says Vasile. "What happens is that your signal from the Deep Space Network has to travel all the way there and then all the way back, and it's travelling at the speed of light, so it takes years."
Just like a ship's captain sailing by the stars, "We have a good enough three-dimensional map of the galaxy around us that you can find out where you are," Lauer says.

So even when limiting your navigation to what's on-board the spacecraft, "It's a remarkable accuracy, with your own camera!"

Some of the water around Antarctica has been getting saltier. And that has affected the amount of sea ice at the bottom of the planet. From a report: A study published Monday in the Proceedings of the National Academy of Sciences found that increases in salinity in seawater near the surface could help explain some of the decrease in Antarctic sea ice that have been observed over the past decade, reversing a previous period of growth.

"The impact of Antarctic ice is massive in terms of sea-level rise, in terms of global warming, and therefore, in terms of extremes," said Alessandro Silvano, a senior scientist at the University of Southampton studying the Southern Ocean and lead author of the study. The findings mean "we are entering a new system, a new world," he said. The Times adds: "the Department of Defense announced it would be no longer be providing some of the satellite data that researchers use to monitor changes in sea ice."

Software developer Anton Zaides argues that software engineers have had it easy over the decades and the "best profession" on earth deserved the wake up call. He writes:It's not just one of the hardest times, it's also one of the most exciting.

I'm hugely optimistic about the software engineering career. All those companies started by vibe-coders all around you? Many will succeed, and will need great engineers to scale up.

Some engineers understand this, and use the chance to skill up. To succeed, you'll probably need all the skills of an engineer, some of a PM, and even a bit of design taste. It's not just about shipping code anymore.

But if you work as a code monkey, getting detailed tickets and just shipping them, you've done this to yourself. You won't be needed pretty soon.

I believe there are too many mediocre engineers, but also not enough great ones.

Climate change is already having an impact on companies around the world. More than half of companies surveyed by Morgan Stanley experienced climate-related operational disruptions within the past year, including increased costs, worker disruption and revenue losses. Extreme heat and storms caused the most frequent disruptions, followed by wildfires and smoke, water shortages, and flooding.

The US spent nearly $1 trillion on disaster recovery and climate-related needs over the past year, according to Bloomberg Intelligence analysis, while nearly two-thirds of Tampa metro businesses reported losses from hurricanes Helene and Milton.

New evidence from a 300-year-old supernova remnant in the Large Magellanic Cloud suggests that some Type Ia supernovae may result from a "double detonation" -- where a helium shell ignites first, triggering a second core explosion in a white dwarf before it reaches critical mass. "While the physics of the process itself are interesting, the key question this raises is whether type Ia supernovae really are all equally bright," writes Ars Technica's John Timmer. "If they can detonate with substantially less mass than is needed for direct ignition of the core, then it's possible that some of them could be considerably less bright." However, the research team notes that additional factors -- such as the influence of binary systems or secondary detonations -- could further complicate the picture. Ars Technica reports: "The detonations in the carbon-oxygen core and the helium-rich shell result in qualitatively different yield products," the researchers behind the new work write in a paper describing it. In the paper, they focus on calcium, which there are two ways of producing. One is from the outer shell of helium, via fusion before the detonation dilutes the material. A second batch of calcium is produced through the fusion of the core material as it's ejected in the supernova, which prevents further fusion events from converting it to even heavier elements. (Material deeper in the core does end up getting fused into heavier material.) Because it's produced by both of the detonations, models predict that the expanding sphere of debris will contain two different shells of calcium, with some space in between them. To find evidence for these shells, the researchers checked an older supernova remnant, which allows enough time for the movement of material to separate the shells by enough distance that they can be resolved from Earth.

They focused their observations on a supernova remnant named SNR 0509-67.5, located in the nearby Large Magellanic Cloud. SNR 0509-67.5 is estimated to be a bit over 300 years old, meaning material has had enough time to move a significant distance away from the site of the explosion. Imaging using a spectrograph on the Very Large Telescope allowed them to resolve what, in effect, was a spherical sulfur sandwich, with the role of the bread played by calcium. In other words, if you were to travel away from the site of the explosion, you would first hit a layer of ionized calcium, followed by ionized sulfur, and then run into a second layer of ionized calcium. This is exactly what computer models that simulate double detonations predict. So, the researchers suggest it is strong support for that hypothesis. The researchers say that the details suggest that SNR 0509-67.5 was a white dwarf with roughly the same mass as the Sun when it exploded, and that its explosion was likely triggered by the detonation of a helium shell with only three percent of the Sun's mass.

Astronomers have detected a mysterious "interstellar object," dubbed A11pl3Z, speeding through the solar system at 152,000 mph. If confirmed, it would be just the third known interstellar visitor, following 'Oumuamua and Comet Borisov. The visiting space object will pass near Mars and the Sun later this year before leaving the solar system forever. Live Science reports: The newly discovered object, currently dubbed A11pl3Z, was first spotted in data collected between June 25 and June 29 by the Asteroid Terrestrial-impact Last Alert System (ATLAS), which automatically scans the night sky using telescopes in Hawaii and South Africa. The mystery object was confirmed by both NASA's Center for Near Earth Object Studies and the International Astronomical Union's Minor Planet Center on Tuesday (July 1), according to EarthSky.org.

A11pl3Z is most likely a large asteroid, or maybe a comet, potentially spanning up to 12 miles (20 kilometers). It is traveling toward the inner solar system at around 152,000 mph (245,000 km/h) and is approaching us from the part of the night sky where the bar of the Milky Way is located. Based on A11pl3Z's speed and trajectory, experts think it originated from beyond the sun's gravitational influence and has enough momentum to shoot straight through our cosmic neighborhood without slowing down. However, more observations are needed to tell for sure.