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Winter has brought California's Sierra Nevada a below-average amount of snow, and the snowpack has been shrinking for weeks.

Aging fields and volatile markets make drilling a tough sell, even with a path cleared for permitting.

President Trump is asserting executive authority to demand California restart controversial offshore oil drilling along its coastline amid soaring gas prices during the war with Iran. Gov. Gavin Newsom quickly pledged legal action against the effort.

An estimated 50% of sterile medical devices in the U.S. are treated with ethylene oxide. It is also a known carcinogen.

Afeela, an EV brand created by Honda and the electronics company Sony, will compete against Tesla and Lucid in California.

A plan to strengthen California's climate program faces pushback as industry groups and some lawmakers warn the changes could drive up already-high energy costs.

A new lawsuit targets California's ability to set its own car emissions standards, which 17 other states follow.

After H5N1 bird flu was detected in elephant seals gathered at Año Nuevo State Park, other marine mammals have also succumbed, including a sea otter and sea lion. So far, only animals in San Mateo County have been affected.

Governments are fighting to hold oil giants like Exxon Mobil accountable for their well-documented efforts to deceive the public about climate change.

AI and robotics companies need data on movements in the physical world. Some are paying gig workers to record themselves cooking dinner and doing laundry.