Earth Hour: Sign Up and Participate!

Earth Hour is our new favorite green event, plus it's the easiest one yet. This Saturday, Earth Hour — a worldwide sustainability campaign that boasted 50 million supporters in 2008 and is shooting for a whopping 100 million this year — asks you to simply turn out the lights for 60 minutes. Cast your planetary vote in "the election between Earth and global warming," the results of which will be presented at the 2009 Global Climate Change Conference in Copenhagen. Just flip the switch, step outside, and look for some new stars as New York fades to black — or at least gets a little darker than usual. Plus, check out the New York Times article on the other two upcoming lights-out projects in the city!