http://www.helium.com/knowledge/226983-what-is-earth-hour-who-started-earth-hour-what-does-earth-hour-do-when-is-earth-hour.xml Helium.com > News (Other) > What is Earth Hour? en-us Copyright Helium.com Wed, 01 Apr 2009 15:32:56 GMT Wed, 01 Apr 2009 15:32:56 GMT