Dear Editor, Re: "Greens to Politicians: Stop the Runaway Coal Train" [News, Jan. 12]: With polar bears drowning in melting landscapes at a rate even the Bush administration cannot ignore, it's becoming harder and harder to deny the realities of global warming, despite the current, ineffectual debates over its existence. Now, we can trace our own state's potential for environmental irresponsibility all the way from asthmatic school children in the Sherman, Texas, area to the rapidly thawing north. But we also have the potential to lay down some new tracks at the state level to enact change at the federal level, which Reps. Doggett, Johnson, and Lee have already begun by co-sponsoring the Safe Climate Act. (Right on, Doggett!) This science-based legislation would work to reduce global warming pollution levels in order to prevent its worst effects. Implemented through the Environmental Protection Agency and Department of Energy, the legislation would put caps on emissions from the largest polluters, establish national efficiency standards, and issue requirements for increased use of renewable energy sources. It is essential that Texans from all over the state urge their congressmen to support the Safe Climate Act so that we can begin a new course of action to protect, not only polar bears, but our children as well.