DVD : Dirt - The Movie
The expression "common as dirt" wouldn't exist if there weren't an awful lot of dirt in this world. But is there as much as we think -- or even as much as we need? And what's been happening to it? Dirt is the outer layer of the Earth and the place where nearly all the world's vegetation comes to life, but the 20th Century was a bad time for dirt -- the rise of corporate farming practices have led to reliance of fertilizers with negative long-term effects on the soil, while clear-cutting of rainforests and global warming are making it harder to grow the food the world needs, making workable soil an increasingly scarce commodity.