WWF's Earth Hour is the worlds largest grass-roots environmental movement towards action on climate change. From it's beginnings in one city, it has become a global phenomenon reaching out to 1.8 billion people worldwide.
In 2012, Earth Hour will take place on Saturday, March 31, 2012, at 8:30-9:30 PM (local time). You can be part of this global campaign, and can inspire change during the hour and by going beyond the hour.
