California's Republican governor and top Democratic lawmakers are talking tough, prompt action to battle climate change, yet unlike its pioneering restrictions on air pollutants, the state is taking more measured steps in regulating greenhouse gases. In fact, Sacramento could end up pushing Washington into action but lagging behind the federal government when it comes to curbing greenhouse emissions. Last week, Democrats led by Assembly Speaker Fabian Nunez and Assemblywoman Fran Pavley, D-Woodland Hills,filed legislation calling for mandatory reporting of greenhouse gas emissions by major emitters in January 2008 and a gradual capping of those emissions starting in 2012. Gov. Arnold...