Eco-Libris is an organization that is promoting books being made with recycled paper. They are also suggesting you balance one book by planting a tree. This is a simple equation. One Book = One Tree. It works like this: for every dollar you send them they will plant a tree. They will also send you a sticker (made from recycled paper naturally) to place on the cover of each book you have eco-balanced to display your Green commitment. Being reminded that every book I read was created via a tree's sacrifice makes me cherish my beloved books all the more.