How Wolves Change Rivers (2014)
03/21/2014 (US) • 5m
Documentary
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.
Top Billed Cast
George Monbiot
Narrator
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