The Environmental Protection Agency's proposal to repeal its 2009 endangerment finding is stoking concerns that the move would create a chaotic regulatory environment and expose companies to lawsuits, legal experts and business groups say. Some believe the Supreme Court could also reverse its 2007 ruling that enshrined the EPA's authority to regulate greenhouse gas emissions, which would exacerbate legal uncertainty. The American Petroleum Institute said it favors a continued federal role in emissions regulation.

Toyota has implemented its Sweep Energy Storage System at Mazda's Hiroshima plant, repurposing used battery packs from electric and hybrid vehicles. The system, which is still in testing, acts as a buffer between the factory's power supplies and the assembly line, utilizing batteries of different capacities and chemistries.

Wind and solar accounted for more than 90% of all new generating capacity added in the US during the first five months of the year, according to the latest data from the Federal Energy Regulatory Commission -- which was released a month late. A SUN Day Campaign analysis found that the US added 1.515 gigawatts of solar across 43 projects in May alone. The data predates the Big Beautiful Bill, but "FERC's forecasts suggest that cleaner and lower-cost renewable energy sources will continue to grow, retaining their lead over coal and nuclear power while closing the gap with natural gas," said SUN DAY's Ken Bossong.

Researchers at Georgia Tech have discovered that fast charging improves the performance of zinc-ion batteries by suppressing dendrite formation, a major issue that typically shortens battery life. The findings, published in Nature Communications, show that fast charging causes zinc to form smooth, dense layers instead of dangerous spikes. This breakthrough could make zinc-ion batteries a viable alternative to lithium-ion batteries for energy storage, says associate professor Hailong Chen.

States are adopting alternative funding methods like electric vehicle registration fees and road use fees to compensate for declining fuel tax revenues, according to the National Association of State Budget Officers. Colorado, Virginia, Hawaii, Georgia, New Jersey and Rhode Island have recently implemented or increased these fees to ensure all vehicle owners contribute to infrastructure maintenance.

Researchers from the Rochester Institute of Technology and Ohio Sea Grant are raising concerns about microplastic contamination in the Great Lakes, with an estimated 22 million pounds of plastic entering the lakes annually. While water treatment plants can remove some microplastics, research indicates they are not equipped to filter out all micro and nanoplastics. "Plastics really dissociate; they break down, they fragment, they turn into smaller, smaller and smaller bits and pieces," said Mark Warman of Ohio Sea Grant.

RWE has started installing recyclable rotor blades at the 1.4-gigawatt Sofia offshore wind farm in the North Sea, with half of the 100 turbines set to feature these blades. Manufactured at Siemens Gamesa's Hull facility, the blades use a special resin that enables the separation and recycling of materials at the end of their operational life.

Cities across the US are encouraging the use of vacant warehouses, strip malls and other structures for vertical farming, enacting zoning changes and offering incentives to revitalize empty buildings, boost local food resilience and reduce transport-related emissions. While concerns about high electricity consumption persist, experts suggest that small-scale vertical farms, when thoughtfully designed, can contribute positively to climate adaptation by enabling agriculture in areas unsuited for traditional farming due to soil or temperature constraints.

Equinix has issued S$650 million (around $505 million) in green bonds in Singapore to fund sustainability projects such as green buildings and renewable energy. With green financing "we can accelerate innovations in energy-efficient infrastructure and clean and renewable energy, and address the growing demands of artificial intelligence and other emerging technologies like liquid cooling," said Equinix's Leong Yee May.

Scientists at the Institute for Biology in Serbia are exploring the use of mealworms to break down polystyrene, with support from the government and the UN Development Program. The project, which aims to help Serbia meet European Union waste treatment standards, has shown that mealworms can digest polystyrene without leaving microplastic residue, potentially offering a sustainable solution to plastic waste.

Researchers have recreated sea silk, a luxurious golden fabric traditionally made from the threads of the endangered giant clam Pinna nobilis, using waste from the clam species Atrina pectinata. The study, published in the journal Advanced Materials, also identified the molecular structure behind sea silk's golden hue, which could lead to the engineering of nontoxic golden pigments for textiles and cosmetics.