California sues EPA to force waiver on greenhouse-gas emissions.

SAN FRANCISCO (NYT)-“”California sued the federal Environmental Protection Agency on Wednesday, challenging its recent decision to block California rules curbing greenhouse-gas emissions from new cars and trucks.

Under the federal Clean Air Act, California has the right to set its own standards on air pollutants, but must receive a waiver from the E.P.A. to do so. The environmental agency broke with decades of precedent last month and denied California a waiver to move forward with its proposed limits on vehicular emissions of heat-trapping gases like carbon dioxide. [more]