Basically, you grab the button and post about the whole thing here and email them and they will plant a tree FOR you. No joke(well, that's what they said). Instead of you having to get your butt up, buy tools and plant stuff, they will do it. How cool is that?! Planting the tree will cover up your ecological footprint FOR 50 YEARS!
So, I'm doing it :) You should do it, too. :D