Plant a tree. Seriously. Or "Like" Paul Mitchell on Facebook and they'll do it for you.
Head to Anthropologie with the kids for some butterfly crafts.
Head to Pottery Barn for an Earth Day Treasure Hunt.
Bring 5 plastic bags to The Disney Store to trade them in for a reusable tote bag.
Enjoy a nearby U.S. national park... for free!
How are you celebrating Earth Day?