Poll: Help Vote on the Next Double Impact Challenge!

Last week, TreeHugger readers selected closing the curtains to block the sun and reduce your dependence on air conditioning as a new challenge for the Double Impact platform. What will it be this week? If you haven't signed-up for Double Impact yet, please do! Chances are you are already doing some of the green challenges, so signing up can put more money in the pockets of great charities!

More on Double Impact
Double Impact Challenge: Why You Should Go Veg
Double Impact Challenge: Why You Should Skip the Drive
Double Impact Challenge: Why You Should Lose That Old Light Bulb