The U.S. Justice Department has requested a rehearing of a decision by the 9th Circuit Court of Appeals to revoke all tolerances of the neurotoxic pesticide chlorpyrifos within 60 days, putting the proposed federal ban back in limbo ...

Children in some California counties visited emergency rooms for asthma at nearly twice the statewide rate, according to the latest data — a phenomenon that experts blame largely on dangerous air pollution...

It’s Fall. That means crisp morning air, dwindling sunlight, and a chance to take stock of legislative victories and setbacks in California, as Governor Brown has now signed or vetoed the