Release Date: 2014-03-21
Overview: When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable "trophic cascade" occurred. What is a trophic cascade and how exactly do wolves change rivers? George Monbiot explains.
Rating: 0 / 10
George Monbiot
as Narrator
George Monbiot - Director
George Monbiot - Writer
Chris Zabriskie - Music
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