Earth Hour started in 2007 in Sydn

Earth Hour 2009 is a global call to action to every individual, every business and every community. A call to stand up, to take responsibility and to get involved in working towards a sustainable future. Iconic buildings and landmarks from Europe to The Americas will stand in darkness. People across the world will turn off their lights and join together in creating the vital conversation about the future of our precious planet.
Over 64 countries and territories are participating in Earth Hour 2009. This number grows every day as people realise how such a simple act, can have such a profound result in affecting change.
Earth Hour is a message of hope and a message of action. Everyone can make a difference.
Taken from:http://www.earthhour.us/about-earthhour.php
...Have you done your part in saving our mother earth? hua hua hua...