WASHINGTON -- Gov. Arnold Schwarzenegger boasted Wednesday that California's leadership is making environmentalism hip, sexy and mainstream, no longer just a guilt-driven movement for "tree-huggers" and "fanatics." "Environmentalists were no fun. They were like prohibitionists at the fraternity party," the moderate Republican governor told a student audience at Georgetown University, part of an East Coast swing to promote his increasingly enthusiastic embrace of the environment. "Successful movements are built on passion. They aren't built on guilt," he said, predicting that environmentalism was reaching a "tipping point" where it will move into the mainstream. "I don't know when the tipping point...