Good ideas can come from anywhere, especially now that we are all connected in the global digital network. In 2007, Earth Hour was an idea conceived by some people in Sydney, Australia who belieived they could make a difference by organizing the city to turn off its electricity for one hour. The event was such a success that its expanding its reach around the world.

At 8pm on March 29, 2008 millions of people in some of the world's biggest cities including Copenhagen, Toronto, Chicago, Melbourne, Brisbane, Tel Aviv and Manila will unite and switch off for Earth Hour.

There's an interactive web site where people can connect and upload videos and photographs and a pdf file with instructions on how you can create an Earth Hour in your town or community.