Californians are more likely than the rest of the nation to see global warming as a threat, but also are more optimistic that greenhouse gases can be cut while creating jobs and expanding the economy, according to a Field Poll released Friday. State residents are more likely than other Americans to back efforts to address climate change, with large majorities favoring government regulations, tax incentives and other efforts by industry and individuals to curb their emissions, the poll showed. "They think California can take the lead in being an innovator and in making the state more energy efficient and reducing...