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This is brilliant. The World Wildlife Fund has created a new green file format (.WWF) that works exactly like a PDF, except you are unable to print it.

“Right now, the file format is only savable and readable on Macs, but a Windows version is coming soon. The software is a plugin that allows you to save anything as a WWF file from the print menu in Mac OS X. It’s basically the exact same thing as a PDF, except you can’t print it out. It also adds a small explainer to the bottom of each WWF document.”

(via Joshua Ross via WWF Document Format Doesn’t Give You a Choice but to Save Paper via WWFDeutschland)

(Source: youtube.com)