When it comes to the environment, Gov. Arnold Schwarzenegger is learning what Kermit the Frog discovered years ago: It's not easy being green. According to a new statewide poll released today, Californians by large margins support many of Schwarzenegger's environmental efforts -- from increasing solar power and hydrogen cars to reducing global-warming emissions. But as the governor's overall approval ratings continue to tumble, the public is giving him little credit for being an environmental leader. Just 32 percent of Californians approve of the way Schwarzenegger is handling the environment, according to a new survey from the Public Policy Institute of...