The WWF format is a PDF which cannot be printed out. Clever, huh? Now you can keep others from killing trees.
The idea is simple. If you want to send a PDF to someone but you feel bad if they print it out, WWF has the answer for you.
The WWF format is a small programme which lets you save your files in a unprintable way. You can download the programme here.
There are quite some other possibilities to impose a certain sustainable lifestyle on the people surrouding you. What about Continue reading
