LA TIMES - Like many of the Californians he represents, Gov. Arnold Schwarzenegger now spends more than three hours commuting because he lives so far from the office. But his ride is a private jet. After flirting briefly with buying a Sacramento abode for his family, then living alone for a while in a 2,000-square-foot hotel penthouse across from the Capitol, the governor has decided to stay nearly every night at his Brentwood mansion. The commute costs hundreds of thousands of dollars a year, which aides say the governor pays for himself. Some environmentalists say the trips expand his carbon footprint enough to undermine his image as a crusader against global warming, despite the pollution credits he buys to offset the damageevan.halper@latimes.com