Help the environment while also going easy on the wallet with eco-friendly supplies from Staples . In honor of Earth Day 2014, select supplies are on sale at up to 50% off their regular retail price. Many products are most likely ones that you've already been using and didn't realize how earth friendly they really were, like Wisk 2X liquid laundry detergent, Method hand washes, Webster Handi-Bag trash bags and more. This sale's ending is unknown, get stocked up at home or the office right away.