While most people associate global warming with impending droughts, floods, and species extinction, some gardeners are reaping the floral rewards of a hotter planet. <br /><br />Is this the upside of global warming or are these gardeners just rearranging deck chairs on the Titanic? <br /><br />Tune in to WIRED SCIENCE on your local PBS station (check local listings). For more information, visit <a class="link" rel="nofollow" href="http://www.pbs.org/wiredscience">http://www.pbs.org/wiredscience</a>