Check out this youtube video of the great Bill McKibben being interviewed about global warming by Wendy Hanamura of LinkTV.
    http://youtube.com/watch?v=nD9hfWiR3ik
 
Here's Bill talking about local food.
    http://www.linktv.org/video/2375
 
And here's a link to a 1 minute video of a fantastic new documentary called the planet.
    http://www.linktv.org/programs/special_planet1