Earth Hour started in 2007 in Sydney, Australia. The idea was to get the city to switch off its lights for 60 minutes. It was so successful that it is now a world wide phenomenon.
I think the whole idea is just fantastic as it makes everybody aware of small details that make a BIG difference. If everybody did simple things like turn their lights off when a space is not being used, appliances off when not being used or turn the heating/air conditioning off when not in the room we could help the planet a little bit….and little by little we could all help a lot!
Read more about Earth Hour