In 2009 hundreds of millions of people around the world showed their support by turning off their lights for one hour.
Earth Hour 2010 will continue to be a global call to action to every individual, every business and every community. A call to stand up, to show leadership and be responsible for our future. — http://www.earthhour.org/
Earth Hour, 8.30pm, Saturday 27th March 2010 :: Pledge your support and turn off your lights for one hour!