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.
Casts: George Monbiot
Director: George Monbiot
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Watch How Wolves Change Rivers
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| Score | Rating Count | Release Date | RunTime |
|---|---|---|---|
| 7.9 | 20 | 2014-03-21 | 5 |