Earth Hour has unveiled its ambitious 2011 global ad which was shot in Sydney and created by Leo Burnett Chicago. The ad was produced by Radical Media. Shot from above, it featured dozens of volunteers with coloured squares strapped to their bodies to create various images including a globe, lightbulb and bicycle. The 2008 TVC was seen by more than 1.3m people worldwide. The new video, which will be viewed by people across the globe, will drive even more involvement in and awareness of Earth Hour. Earth Hour takes place next month.