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 in this movie remix.

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“When we try to pick out anything by itself, we find it hitched to everything else in the Universe.” – John Muir

B-Roll Credits:
“Greater Yellowstone Coalition – Wolves” (http://bit.ly/1lK4LaT)
“Wolf Mountain” (http://bit.ly/1hgi6JE)
“Primodial – Yellowstone” (https://vimeo.com/77097538)
“Timelapse: Yellowstone National Park” (http://bit.ly/1kF5axc)
“Yellowstone” (http://bit.ly/1bPI6DM)
“Howling Wolves – Heulende Wölfe” (http://bit.ly/1c2Oidv)
Interview from TED: “For more wonder, rewild the world” by George Monbiot
“Fooled by Nature: Beaver Dams” (http://bit.ly/NGgQSU)
Music Credits:
“Unfoldment, Revealment, Evolution, Exposition, Integration, Arson” by Chris Zabriskie (http://bit.ly/1c2uckW)

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