We, at Yahoo!, feel that fighting climate change is a serious business. In celebration of Earth Day, April 22, check out our cool sites that are committed to positively impacting the environment:

Yahoo! Earth Day Site - tips on reducing your environmental footprint.

Energy Star Products - an energy-saving shopping guide.

Yahoo! Autos Green Center - cars that care about climate change.

18 Seconds - change a light bulb, change the world.

Yahoo! Groups Going Green - join in to make a difference.

Big Shot in Cannes - make a green ad and we'll send you to an epic ad event.

GreenWorld Contest - Yahoo!-supported contest to inspire green activisim.

Yahoo! Goes Carbon Neutral - what we do to cut energy consumption.

The Great Turtle Race -  a race to save the leatherback turtles.

Join us in celebrating Earth Day!