San Francisco Chronicle: California regulators, following the lead of Bay Area air quality managers, will impose fees on the state’s worst air polluters as part of a bold proposal to slash emissions to 1990 levels. The fees, along with green technology job training and a “cap and trade” system outlined today by the California Air Resources Board, would vault the state ahead of federal efforts to curb climate-changing greenhouse gases. The plan is “recognition of the severity of the problem and …