Cowabunga, dude! It's time to step up for mother nature with this awesome Teenage Mutant Ninja Turtles Keep the Earth Green Men's Graphic T-Shirt that features a distressed circle design of Donatello, Leonardo, Michelangelo, and Raphael with the phrase "Keep the green earth green," across the front. If you're planning on fighting the Foot Clan, do it in your favorite Teenage Mutant Ninja Turtles design with all your favorite characters!