A couple of years ago, I watched a film on YouTube called 'Home'. It was made by Yann Arthus-Bertrand and features stunning photography and views of the earth that most people have never seen.
Aside from the sheer beauty of much of the filming, there are other, less pleasing moments as Yann's photography puts the scale of humanities impact on the earth into perspective. Whether it's the scale of the Alberta Oil Sands and it's pollution or the plastic polytunnels and greenhouses in Spain that supply much of Europe's vegetables, you cannot fail to be moved in some way.
Here's a trailer to the film.
Yann wants as many people as possible to see the film, and as such, has made it publicly available for you to watch, download, share and so on. You can find it on YouTube here:
Standard definition: http://youtu.be/jqxENMKaeCU
High definition (recommended): http://youtu.be/jqxENMKaeCU?hd=1
Yann also appeared on a TED talk - there are many 'deep' moments within the talk, but above all are his words "We don't want to believe what we know". A stirring call to action.