Earth Hour: Where it all began

On March 31, 2007, 2.2 million people and 2100 Sydney businesses turned off their lights for one hour – Earth Hour. If the greenhouse reduction achieved in the Sydney CBD during Earth Hour was sustained for a year, it would be equivalent to taking 48,616 cars off the road for a year.

With Sydney icons like the Harbour Bridge and Opera House turning their lights off, and unique events such as weddings by candlelight, the world took notice. Inspired by the collective effort of millions of Sydneysiders, many major global cities are joining Earth Hour in 2008, turning a symbolic event into a global movement.

Also see: The Greenpeace campaign to "Ban the Bulb"