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From its inception as a single-city initiative, Sydney, Australia, in 2007, Earth Hour has grown into a global symbol of hope and movement for change. Earth Hour 2010 created history as the world's largest ever voluntary action with people, businesses and governments in 128 countries across every continent coming together to celebrate an unambiguous commitment to the one thing that unites us all -- the planet.
Sign up to earthhour.org, switch off your lights for Earth Hour 2011, and share the positive actions you will sustain for earth beyond the hour. Saturday, March 26, 2011 – Lights Out for Earth Hour!
Universe Today | Tammy Plotner | 2011 March 25
Earth Hour: Protecting the Night Sky from Light Pollution
Space.com | Skywatching | Joe Rao | 2011 March 25
Earth Hour aims for hope in darkened world
PhysOrg.com | Environment | Madeleine Coorey | 2011 March 25
World urged to use 'Earth Hour' to protect planet
PhysOrg.com | Environment | Madeleine Coorey | 2011 March 26
Earth Hour Tonight: What Time? What's the Point?
National Geographic | Brian Handwerk | 2011 March 26