I've mentioned my commitment to sustainability on this blog earlier. I'm still committed to this issue and if you are as well, here is a very easy way to join the movement and get some great music. Go to http://www.musicforaction.org/ to take action on climate change (contact your legislators) and download the Best of Bonnaroo. Even if you don't share my taste in music, you're bound to find something you like on this album (includes artists like Jack Johnson, Wilco, Death Cab for Cutie, and The Decemberists).
It's definitely worth a couple minutes of your time, and those minutes can make a difference for our planet.