Earth Hour is a global WWF climate change initiative.  Individuals, businesses, governments and communities are invited to turn out their lights for one hour on Saturday 27 March 2010 at 8:30 PM to show their support for action on climate change.

The event began in Sydney in 2007, when 2 million people switched off their lights. In 2008, more than 50 million people around the globe participated. In 2009, Earth Hour aimed to reach out to 1 billion people in 1,000 cities. Let's see what we can do in 2010...