Los Angeles adopted an effort to divert 90% of trash from landfill by next year, but residents and businesses continue to dump millions of tons of waste.
Environmental regulators have found explosive levels of methane in a popular Berkeley park. Regulators and the city are sparring over the source of the gas and what to do about it.
Ex-Gov. Arnold Schwarzenegger and actor Jane Fonda joined Gov. Gavin Newsom and environmentalists calling to uphold the state's oil drilling restrictions.