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.
Genre: Documentary
Stars: George Monbiot
Crew: George Monbiot (Director), George Monbiot (Writer), Chris Zabriskie (Music)
Country: United States of America, United Kingdom
Language: English
Studio: Sustainable Man
Runtime: 5 minutes
Quality: HD
Released: Mar 21, 2014
IMDb: 10
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