Firstly. Watch this documentary. It's amazing. The best cinematography and really complete, informative information about sustainability and our destruction of the natural earth. (I find it ironic that people want to "Save the Earth" because no matter what we do, the earth will still be here. We need to "Save Ourselves from Ourselves" because we are going to be the ones suffering from outcome of the exceedingly excessive ways of living.)
The HOME Project - http://www.youtube.com/watch?v=jqxENMKaeCU seriously, watch it. It's incredible. It's a full movie, so maybe watch it in parts. But if your computer is fast enough, definitely watch in HD.
Secondly. Edward Sharpe and the Magnetic Zeros is a fun band. You've probably heard the song "Home" by them. I've been listening to them for a while, but just saw the music video for "Home" yesterday. It's really good. One of the better music videos I've seen.
Edward Sharpe and the Magnetic Zeros "Home" from Edward Sharpe on Vimeo.
and another good song by them is - 40 Day Dream