This environmentally aware Darth Vader tee ($22.50) is just one of the cheeky Star Wars "organic" designs Zazzle is promoting in advance of Earth Day, but the real green action behind the shirts comes after you've exited the store. For every Star Wars shirt you buy, Zazzle will plant a tree via American Forests. Just enter code PLANTATREE09 at checkout, and don't forget: These come in grown-up sizes, too.
