Over the past several weeks, 30,281 (and counting) Green Challenge participants have pledged to shed 60,299,408 pounds of carbon dioxide, the equivalent of taking 6,164 cars off the road for a year. Now comes the moment of truth: How many of your pledges have you fulfilled? Did you really cut beef from your diet, inflate your car tires, turn down your thermostat, and take the train instead of flying? The Green Challenge wrap-up quiz asks you to revisit your pledges. Will we meet our goal of a 20 percent reduction in collective carbon emissions? Only you can help us find out! If you've already taken the wrap-up quiz: Thanks! If you haven't clicked through yet, what are you waiting for? (It won't take long, we swear.) And if you're one of the first 500 quiz-takers to meet your personal 20 percent reduction goal, we'll send you a free T-shirt from I'm Organic. Learn about The Slate Green Challenge here, or go straight to the ::Slate Green Challenge Wrap Up Quiz.