WWF file format: it is like a PDF that is impossible to print

Have you ever received a PDF in your email, only to find yourself weeping moments later after accidentally printing 349 copies and murdering six or seven endangered trees in the Panamanian rain forest? It's more serious of a problem than you may realize. In order to solve spontaneous bouts of Accident Print Syndrome, the World Wide Fund For Nature has created the WWF file format. We'll let the entity itself explain: The WWF format is a PDF that...

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