San Diego Union-Tribune: Hoping to loosen oil’s grip on California, state air-quality regulators yesterday passed landmark rules to stimulate the market for alternative fuels and slash greenhouse-gas emissions at the same time. Once fully in place by 2020, the regulations are expected to drive both subtle and significant changes in the types of vehicles and fuels sold in California’s vast market. “No longer will gasoline derived from petroleum be the only game in town,” said Mary Nichols, chairwoman of …