Let's do it!

Earth Hour is tonight -- all around the planet people will be switching off lights in order to turn on more support to fight global warming.

Lots are blogging about what they're doing for the day, already underway in parts of the world.

Even Shepard Fairey, the artist who did the iconic Obama image, has jumped in with his take to help inspire participation.

I'm going to do it, what about you?

http://www.earthhour.org/home/