OK, so I’m a little late to the party on this one, but I thought it was worthy of mention.
I was going to Google something (yeah, yeah, I know Google isn’t supposed to be used as a verb), and I noticed that the background of the page was black, with a link about Earth Hour.
Tonight was the night for Earth Hour, in which folks would turn off their lights from 8-9pm (local time), and take a little bit of pressure off the Big Blue Marble. Obviously, I missed the event, but the website has good info about how to make every hour Earth Hour.
Below’s a video talking about the project, and this year’s event. Enjoy!