United Press International: U.S. President George Bush may shift his eco-attitude as early as this week, saying he wants Congress to pass a bill to combat global warming, aides said. While specifics are being debated, Bush administration officials said they think they need to act now rather than risk more regulation in the future, The Washington Times said. "This is an attempt to move the administration and the party closer to the center on global warming. With these steps, it is hoped that the …