Archaeologica.org

Seven countries, 17 cities (so far) and a growing movement that truly begins at home.

It might seem an inconsequential thing to turn out the lights in your house for an hour on a Saturday night.

With vast clouds of greenhouse gases spewing from vehicles, factories and generating stations around the world, it's like an ant trying to halt the juggernaut of destructive climate change.

But Earth Hour is all about the power of one, multiplied many, many times.

If you, your neighbours and many others take the little step between 8 and 9 p.m. on March 29, not only will the city's electricity consumption drop for 60 minutes, you'll be making a major statement to sluggish governments and industry, and to one another.