Digital Charity 2010
Save as WWF
Insight
Millions of square meters of rainforest are cut down each year just for paper.
Idea
A digital document that can't be printed.
Execution
The WWF file format, a digital document that can as many pages as a tree, but cannot be printed, meaning each time you create one you can save a tree.
Notes
Crazy to imagine how much wastage there was back when we used to print everything. This is an awesome solution to that problem.