How Wolves Change Rivers
3/21/20140h 5min0.0/10(0 TMDB votes)
Documentary
Directed by George Monbiot
Plot
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.
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