william rast

Earth Hour is a sort of open-source movement against global warming. On Saturday, March 28, at 8:30 p.m. in each time zone, millions of people in thousands of cities are expected to turn off the lights for one hour to raise people's consciousness about the link between global warming and energy use.

Started in Australia two years ago, the event is mushrooming thanks in part to the Internet and social media.
william rast
One day before the start of the event in Asia, "Earth Hour" is the top search item on Twitter. A 30-second clip about Earth Hour on You Tube has gotten almost 59,000 views. Facebook groups count hundreds of thousands of members.