"Eric Knapp breaks apart a burned pine cone, looking for seeds — in his line of work this is considered a clue."

"SAN BRUNO -- PG&E pleaded not guilty Monday to a new federal criminal indictment on felony charges linked to a fatal 2010 natural gas pipeline explosion here, and hours later, San Bruno officials requested that the state Public Utilities Commission preserve computer drives and digital data that could shed light on ties between the PUC and the utility it oversees."

"California voters will be asked to authorize $7.5 billion to bolster the state’s water supply, infrastructure and ecosystems in November, as lawmakers and Gov. Jerry Brown on Wednesday struck a long-sought deal to move a new water bond to the ballot."

"SEQUOIA NATIONAL PARK, Calif. — High in the Sierras, biologists are struggling to find ways to protect some of the world’s oldest and most storied trees from drought, forest fires and climate change."

"Los Angeles is showing its age, and city officials don’t have plans for financing the facelift."

"A program being launched off the California coast this summer will tackle two environmental problems posed by thousands of cargo ships that ferry goods to and from the ports of Los Angeles and Long Beach each year: Not only are the hulking vessels major sources of air pollution, their shipping lanes overlap with a prime feeding area for migrating blue whales off Santa Barbara."

"NICE, Calif. — An abandoned recreational vehicle was the first clue. In this hamlet two hours north of San Francisco and barely a mile from the largest natural freshwater lake in the state, the trailer sat on a hill, hidden from the main drag. Behind it rose a flimsy fence, tall enough to shield its bounty: 50 marijuana plants in hastily constructed wooden boxes."

"A tropical rain storm that caused deadly floods and destructive mudslides in the San Gabriel Mountains on Sunday was the kind of weather event seen only once about every 500 years, the National Weather Service said."

"More than half of California is now under the most severe level of drought for the first time since the federal government began issuing regular drought reports in the late 1990s, according to new data released Thursday."

"The state's plan to build a pair of 35-mile tunnels under the delta would cause the extinction of winter-run chinook salmon, steep declines in dozens of other species and devastate water quality in San Francisco Bay, an environmental group said Wednesday."