Tree-Free has printed on Kenaf, a fast growing plant related to the hibiscus. They have printed on bamboo, on hemp, and most recently on 100% bagasse (sugarcane waste pulp). At present, they are focused on using post consumer recycled paper. About 35% of municipal solid waste by weight is paper and paper products. Tree-Free is committed to reversing this trend. They print on Mohawk 50% recycled / 15% post consumer recycled paper for their cards, and 100% pcw recycled uncoated paper for their envelopes, journals, etc.