TED Talk: My Subsersive Garden  http://www.ted.com/talks/lang/en/roger_doiron_my_subversive_garden_plot.html

TED Talk: 11 Talks on the Transformative Power of Vegetables http://blog.ted.com/2012/08/09/10-talks-on-the-transformative-power-of-vegetables/

Video:  Vanishing of the Bees 
Video:  Dirt the Movie