Environment News Service: Losses inflicted by Hurricane Katrina on Gulf Coast forest trees are great enough to cancel out a year’s worth of new tree growth in other parts of the country, according to a new study led by biologist Jeffrey Chambers of Tulane University. "The carbon that will be released as these trees decompose is enough to cancel out an entire year’s worth of net gain by all U.S. forests. And this is only from a single storm," says Chambers, lead author of an article detailing the …