You don’t need superpowers to make a difference. Even the merest of mortals can design a reusable towel that will foil those pernicious paper disposables. Want to talk dastardly? Americans use more than 3,000 tons of paper towels in a single day, or the equivalent of 51,000 trees and 60 million gallons of water. To help stem the problem, simply enter Inhabitat and PeopleTowels’ “Stop the Paper Towels” design contest. The grand-prize winner will receive $500, see his or her design go into production, as well as receive 10 percent in royalties from sales. No capes necessary.