The World Wildlife Federation announced the creation of its first file format, WWF, designed as a replacement for PDF. It's essentially identical to PDF, except for one key difference: It can't be printed. The WWF hopes this will reduce unnecessary paper use, or at least bring some attention to the fact that lots of paper use is unnecessary...Via PopSci, where the commentary is generally dismissive.
The WWF format is essentially a plugin (Mac-only for now, but coming to Windows soon) that allows the user to save any document as a WWF. Those files can be opened and viewed in most programs used to open PDFs, except they can't be printed (and they add a little note about saving paper to the bottom of documents).
