Discovery Project Earth

You've heard the dire warnings and seen the detailed slide shows, and you've even bought that lightbulb with the swirls. You wonder, though, how can small, individual measures like switching to CFLs and using canvas grocery bags in lieu of plastic be enough to save the planet? Tune in to Discovery Project Earth and watch as some of the world's leading scientists put the most ambitious geo-engineering ideas to the test in order to tackle global climate change. From covering acres of Greenland's…