The World Wide Fund for Nature (WWF) has introduced a new file format to raise awareness of the global deforestation crisis.
"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."
The software can be downloaded for free at http://www.saveaswwf.com/en/.
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