Every time you print from your computer it affects nature (and we know it). If HP develop software together with Greenpeace they could in the print screen window offer you to plant a tree every time you print out a paper (when you choose copies of paper to print you can also choose numbers of trees to plant). The payment solution is no problem; there are numbers of software to choose from. But think about the potential for nature, and think about the sales people from HP that can offer a “plant tree printer,” that will give them new green dollars.