Beginning in Sydney, Australia three years ago, Earth Hour has grown into a global observance. States, large organizations and individual people observed Earth Hour 2010 on Saturday March 27th, as homes, office towers and landmarks turned off their lights for an hour starting at 8.30 pm local time to raise awareness about climate change and the threat from rising greenhouse gas emissions.

These two photos show Malaysia’s landmark Petronas Twin Towers before, left, and after being turned off its lights to mark Earth Hour in Kuala Lumpur, Malaysia, Saturday, March 27, 2010. (AP Photo/Lai Seng Sin)

Overview of Hong Kong Island and Kowloon with lights on and off to mark Earth Hour 2010. [click image to see it fade – javascript required] (© Ringo Ma, via WWF) # Continue reading Earth Hour 2010