The big turn off

March 29, 2008

Towns and cities around the world are turning out the lights for an hour to highlight the threat from climate change. Sydney's picture-perfect harbour was the first to be plunged into darkness to observe Earth Hour, the greenhouse awareness initiative launched in the city in 2007. More than 2.2 million Sydney-siders took part in the event which will be observed around the world at more than 370 locations.