Spaceship Earth Forests Trees give us wood for fuel, building, and paper. They also make oxygen, which we breathe often and in great amounts. And while trees are doing that, they remove from the atmosphere large quantities of carbon dioxide, the main gas that causes global warming. So trees are definitely cool, in fact, because of their shade, we are all a lot cooler. But they are getting destroyed at alarming rates.
Recycling paper is just one way to preserve trees and forests.
There are lots of other ways too. These groups are actively involved in helping the trees.