Some mad genius has uploaded an audio clip to Spotify. Stream it while you sleep and the revenue generated by all the repeat listeners around the world is used to plant trees.
Of course, I don't have Spotify so have no idea what you'll be listening to, but if you subscribe to it, maybe give the track (repeated) listens to assuage your guilt. (j/k!)
The site for the track is at thissongplantstrees.com: