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California adopted new rules to better detect and curb methane leaks from landfills, aiming to reduce the state’s second-largest source of climate-warming pollution.

The Interior Department released its plan to open up federal waters off California’s coast to oil drilling, setting up a direct confrontation with Sacramento on energy and climate change.

A new study warns that rising seas could flood nearly 250 Bay Area Hazardous sites, putting already vulnerable communities at greater risk of toxic exposure.

Soaring health insurance costs are forcing some Californians to make tough choices — from dropping coverage to leaving the state or even the country — as federal subsidies expire and premiums surge.

If there ever was a bug that we should all raise a glass of wine for, it's the mealybug destroyer. This heroic bug has been brought in to protect grape vineyards from being ruined by the mealybugs sticky honeydew excrement. But first, the mealybug destroyer must get past the mealybugs’ army of ant bodyguards who want that sweet honeydew excrement for themselves.

A new bill sponsored by Sens. Adam Schiff and Alex Padilla would explore landmark respiratory protections to shield wildland firefighters from dangerous wildfire smoke.

A UC Berkeley bioethics professor warns that kids may be susceptible to self-harm or suicide when Character.AI bans youth under 18 from using its chatbots this month.