On Saturday 27 March 2010. 8:30PM local time, millions of people will turn off their lights for one hour .

This global blackout is motivated to fight global warming.

Earth hour is the largest environmental campaign in history. It consists of turning off the lights and electrical appliance - for an hour, to make a global statement of concern about climate change and to demostrate commitment to finding solutions. Turn out out.Take action. Be part f this historic event.Be part of Earth Hour