A new green file format: WWF. The WWF format is a PDF that cannot be printed out. It’s a simple way to avoid unnecessary printing. So here’s your chance to save trees and help the environment. Decide for yourself which documents don’t need printing out — then simply save them as WWF.
Download software: saveaswwf.com
very convincing and prompting awareness.
wiki-save-the-trees, leak it to the world.