National Geographic - Inside Marijuana

del 1: http://www.youtube.com/watch?v=2YGat8xdfes
del 2: http://www.youtube.com/watch?v=a4lhIxYiL8A
del 3: http://www.youtube.com/watch?v=64EfbK9fbcA
del 4: http://www.youtube.com/watch?v=bobx1sOQgXc
del 5: http://www.youtube.com/watch?v=90BfogUHRV8