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!
Poll: Help Vote on the Next Double Impact Challenge!
What should be the next Double Impact challenge?survey software