San Francisco Chronicle: Despite Californias many efforts to fight global warming, the states greenhouse gas emissions rose in 2012, as a nuclear power plant shut down and the drought hit hydroelectric dams hard. But the increase, it turns out, didnt last. Data released by the state on Tuesday show that Californias emissions of carbon dioxide and other heat-trapping gases started falling again in 2013. The drop wasnt much, just 0.3 percent. The states economy still pumped almost 460 million metric tons of greenhouse...