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Health officials credited measures including large-scale investments in drug treatment and overdose prevention for a sharp decline in drug overdoses.

The second and final stage of the Wallis Annenberg Wildlife Crossing begins in July, with tasks far more challenging than the first and partial closures of Agoura Road.

Federal officials are reporting the lowest numbers of gray whales counted since the 1970s. More than 20 have died in S.F. Bay this year.

A proposal to sell off up to 3 million acres of public lands across the West is in limbo after the Senate parliamentarian ruled it out of the reconciliation bill.

A new data tool shows how large the gaps are between environmental health risks and outcomes in Latino and white neighborhoods in Los Angeles.

California's aquifers gained an estimated 2.2 million acre-feet of water during the last water year. Gov. Gavin Newsom's administration has been promoting efforts to replenish groundwater.

State officials raise alarm as hedge funds seek to buy claims that insurers may have against Southern California Edison if it's found liable for the devastating Eaton fire in Altadena.

Indirect costs are fat targets for budget slashers, but beware: They make science possible. They don't pay for the chromatograph I use in my experiments, but they do pay for the electricity to run it.

The 2001 rule protects national forestland in California and many other states from road construction and timber harvesting.

Newsom has called for a future free of plastic waste, yet a single-use plastic bottle is usually by his side during his podcasts.