Earth Hour 2009
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 March 28, 2009 at 8:30 PM (local time) 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 aims to reach out to 1 billion people in 1,000 cities.