Being FSC certified shows that you comply with the highest social and environmental standards on the market. As public concerns about the state of the world’s forests and timber resources increases, FSC provides you with a credible solution to complex environmental and social issues.
http://www.fsc.org

The Sustainable Forestry Initiative (SFI) program is a comprehensive system of principles, objectives and performance measures developed by professional foresters, conservationists and scientists, among others that combines the perpetual growing and harvesting of trees with the long-term protection of wildlife, plants, soil and water quality.
http://www.aboutsfi.org

Through the endorsement of national certification systems, PEFC motivates and enables people to sustainably manage their forests and works to provide a market for the products of those forests.
http://www.pefc.org