For the first time, researchers have shown that reducing air pollution leads to improved respiratory function in children ages 11 to 15, a critical period of lung development.

A shallow magnitude 3.1 earthquake was reported Monday evening five miles from The Geysers, Calif., according to the U.S. Geological Survey. The temblor occurred at 7:18 p.m.

Human-caused climate change helped fuel the current California drought, says a Stanford University study released Monday.

(Reuters) - Nearly all California voters believe the state's water shortage is a serious problem, though they were split on whether environmental protection should be rolled back in response, accor

A shallow magnitude 3.7 earthquake was reported Wednesday afternoon in Joshua Tree National Park, 13 miles from Twentynine Palms, according to the U.S. Geological Survey.

On a summer day in 1885, three Hawaiian princes surfed at the mouth of the San Lorenzo River at Santa Cruz in California on crudely constructed boards made from coastal redwoods, bringing the sport

Ultrafine particles, common traffic pollutants, linked to heart disease deaths in California, study finds.

A referendum to overturn California's first-in-the-nation statewide prohibition of single-use plastic grocery bags qualified on Tuesday for the November 2016 ballot, preventing the ban from taking

Reforms to strengthen the EU’s flagship policy for cutting carbon, the emissions trading scheme (ETS), will start at the end of 2018 following a vote by MEPs on Tuesday.