Started in Sydney, Australia in 2007, Earth Hour quickly grew into a global observance. More than 1,000 cities in over 80 countries observed Earth Hour 2009 on Saturday March 28th, 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.
A combination of handout pictures shows a view of the Taipei 101 building before and after (L-R) Earth Hour in Taipei March 28, 2009. More than 80 countries have signed up for Earth Hour on Saturday in which homes, office towers and landmarks will turn off their lights from 8.30 pm local time to raise awareness about climate change and the threat from rising greenhouse gas emissions.
The Beijing Olympic swimming pool, better known as the "Water Cube" goes dark to observe the call to turn off non-essential lighting for one hour for climate change during World Wildlife Fund's Earth Hour in Beijing on March 28, 2009.