I know ecologists often come with great ideas how to save some random resource. There was a "green" font, which contained holes and was supposed to save ink/toner from printers. It turned out not to be that big saver as the font itself was actually a bit wider than usual...
Today I got to know about "new" file format called WWF. Technically it is just a PDF with disabled printing. Well at least it is not a new format, so users of other operating systems (WWF software is available for Mac OS X only right now) are not lost and can use existing tools to view the files (on Linux you can for example use Evince).
And if Evince rejects to print this document, just disable these restrictions:
gconftool-2 -s /apps/evince/override_restrictions -t bool 1
Is it really helpful for environment to spend resources on creating yet another useless file format?