Climate

Researchers have found that pollutants in the Tijuana River, which carries raw sewage and industrial waste from Tijuana, are also turning up in the air along the coast near the …

The Supreme Court declined Tuesday to hear an Apache religious challenge to the construction of a massive copper mine on Oak Flat, a swath of untouched federal land in Arizona …

As the Colorado River’s giant reservoirs have declined during the last two decades, even larger amounts of water have been pumped and drained from underground, according to new research based …

As California positions itself as a leader on climate change, former Los Angeles mayor and gubernatorial candidate Antonio Villaraigosa is pivoting away from his own track record as an environmental …

Firefighters made steady progress fighting a slow-moving brush fire near Yosemite National Park and Mammoth Mountain on Sunday. The Inn fire began Thursday afternoon off Highway 395 in Mono County. …

The Sepulveda Basin Wildlife Reserve suffers from many of the ills that might be expected of a natural area located in the middle of the nation’s second-largest city, including litter …

Yosemite National Park’s eastern entrance will reopen just in time for Memorial Day, officials announced this week. Tioga Road — a popular scenic section of Highway 120 — has been …

Water began flowing from a pipe onto hundreds of acres of dry, sunbaked lake bed as California officials filled a complex of shallow ponds near the south shore of the …

Donald Trump had just been elected president when I first visited the sprawling Wyoming ranch of conservative billionaire Phil Anschutz in late 2016. But my tour guides didn’t let President …

HONOLULU — Environmentalists are challenging in court President Trump’s executive order that they say strips core protections from the Pacific Islands Heritage Marine National Monument and opens the area to harmful commercial …