The California Supreme Court ruled Thursday that public agencies reviewing a development proposal generally do not have to consider the effects of environmental conditions on future occupants unles

More than half of U.S. states are poorly prepared to respond to infectious disease outbreaks, a new report says.

Why is it so warm this winter? It could have something to do with El Niño.

More than four years into a drought, California's efforts to manage the crisis have produced mixed results, according to a report card issued Monday by a leading environmental nonprofit organizatio

SAN FRANCISCO—A toxin produced by marine algae can impair sea lions' memory, scientists reported Monday, making it difficult for sick sea lions to find their way to food.

The rainfall and snowpack so far this autumn have been encouraging, but the stubborn reality is that California is still mired in drought.

Textbooks in California public schools are misleading students on climate change, with material that expresses doubt over whether it is real and promotes the view that increasing temperatures may b

A northern white rhinoceros, one of just four left on Earth, died on Sunday at the San Diego Zoo Safari Park after suffering from a bacterial infection and age-related health issues, zoo officials