California's Air Resources Board is moving ahead with plans to delay the nation's toughest diesel emissions rules, allotting truckers wrestling with the economic downturn more time to invest in cleaner trucks. Wednesday's decision came after regulators heard from dozens of truckers who say ...

California air regulators have approved the nation's first statewide carbon fee on utilities, oil refineries and other polluting industries, despite industry objections. The money raised by the California Air Resources Board is intended to pay for the bureaucratic expenses of carrying out a 2006 law. It requires ...

California air regulators approved strict regulations Thursday for aerosol air fresheners, paint thinners and solvents as a way to lessen smog-forming emissions and reduce a health threat. The state Air Resources Board voted 8-0 to ban the sale of products that emit high levels of so-called volatile ...