Fecha de lanzamiento

21 Mar, 2014

Tiempo de ejecución

00:05: (HH:MM)

Sinopsis

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.

Fotos

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Actores

George Monbiot

Multitud

George Monbiot

George Monbiot

Chris Zabriskie