United States

Wind turbines at sunset

Fossil fuels fall below 50% of U.S. electricity for the first time since the 1800s

In a major milestone for climate action, the U.S. hit a new record low for fossil fuels in the electricity mix last month as solar and wind reached a record high, according to new data from global energy think tank Ember. In March 2025, fossil fuels accounted for less than 50% of electricity generated, for the first month on record. The shift meant that clean sources generated more than half (50.8%) of U.S. electricity for the first month on record. 

Chevron gas station

Chevron ordered to pay $740 million to restore Louisiana coast in landmark trial

Jurors have found that energy giant Texaco, acquired by Chevron in 2001, had for decades violated Louisiana regulations governing coastal resources by failing to restore wetlands impacted by dredging canals, drilling wells, and billions of gallons of wastewater dumped into the marsh. The case was the first of dozens of pending lawsuits to reach trial in Louisiana against the world’s leading oil companies for their role in accelerating land loss along the state’s rapidly disappearing coast.

Prairie Land Potawatomi Nation's Chief Shab-eh-nay

Illinois returns stolen land to Prairie Band Potawatomi Nation

The Prairie Land Potawatomi Nation has reclaimed land in Illinois that was promised to the tribe’s leader 175 years ago but stolen by the federal government 20 years later. A law signed by Gov. JB Pritzker last week transferred Shabbona Lake State Recreation Area, 1,500 acres in north-central Illinois. “We are proud to once again call this land home,” said Joseph “Zeke” Rupnick, chairman of the Prairie Band Potawatomi Nation based in Mayetta, Kansas.

Satellite from above with Earth below|nasa unsplash

First Earth Fire Alliance satellite for detecting wildfires is now in orbit

The FireSat constellation, which will consist of more than 50 satellites when it goes live, is the first of its kind that’s built to detect and track fires. It’s an initiative launched by nonprofit Earth Fire Alliance, which includes Google and Muon Space as partners, among others. According to Google, current satellite systems rely on low-resolution imagery and cover a particular area only once every 12 hours to spot large wildfires spanning a couple of acres. FireSat will be able to detect wildfires as small as the size of a classroom and deliver high-resolution visual updates every 20 minutes.

A household heat pump

California to install 6 million heat pumps by 2030

In 2022, California Gov. Gavin Newsom set a goal for the world’s fifth-largest economy to deploy 6 million heat pump units by 2030. Last week, the California Heat Pump Partnership announced the nation’s first statewide blueprint to achieve the state’s ambitious goals for deploying heat pumps, a critical tech for decarbonizing buildings and improving public health. Looking beyond the 2030 target, the Golden State ultimately needs to deploy an estimated 23 million heat pumps to decarbonize its residential and commercial sectors by 2045.

Minneapolis at night

Minneapolis to become first city in North America to own and operate biochar facility

Biochar is a specialized charcoal created by heating wood waste to 700 degrees in a low-oxygen environment. The Minneapolis biochar facility will have the capacity to annually: process over 3,000 tons of wood waste, produce over 500 tons of biochar, and remove nearly 3,700 tons of carbon dioxide (the equivalent of taking over 789 cars off the road). Construction is expected to begin this spring with biochar production beginning in the summer or early fall.

Good news for public health

Annual jab for HIV protection passes trial hurdle

An annual injection designed by California’s Gilead Sciences to guard against HIV has completed an important early safety trial, researchers report in The Lancet medical journal. Lenacapavir stops the virus from replicating inside cells. For the trial, 40 people without HIV were injected into the muscle with lenacapavir, with no major side effects or safety concerns. And after 56 weeks, the medicine was still detectable in their bodies. If future trials go well, it could become the longest-acting form of HIV prevention available.

Monarch butterfly

Eastern monarch butterfly population nearly doubles in 2025

The population of eastern monarch butterflies – which migrate from Canada and the US to Mexico during the winter – has nearly doubled over the last year, according to a recent report commissioned in Mexico, generating optimism among nature preservationists. The growth in numbers for the orange-and-black butterflies follows years of ongoing conservation efforts – and perhaps provides a sliver of optimism after otherwise discouraging long-term trends for the species.

Human eye up close

Stem cell therapy trial reverses “irreversible” damage to cornea

A new study conducted by scientists at Massachusetts Eye and Ear investigated a new treatment that removes stem cells from a patient’s uninjured eye, growing their population in the lab for a few weeks, then surgically transplanting them into the injured eye. The phase 1/2 trial recruited 14 patients to undergo the procedure. By the first checkup at three months, the corneas of seven (50%) of the participants had been completely restored. By the 12-month mark, that number had increased to 11 (79%) patients.

California now has more EV charging ports than gas nozzles

California has steadily amassed its EV charging network with both public and private charging ports over the last few years. In 2024, California boasted 178,500 total EV ports compared to around 120,000 estimated gas nozzles, according to the California Energy Commission. The number of accessible chargers across California has nearly doubled since 2022. Since August, the last time these figures were publicly updated, the state has recorded roughly 26,000 additional publicly accessible EV chargers.