This Is Amazing: How Wolves Change Rivers 4:34

27,517,015 views · 0 comments

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. (Thanks, Sarah!)

Loading comments ...