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 by Sustainable Man.
If you enjoyed this video then you will love one of the following:
- At First This Looked Like A Normal Restaurant, But Then I Realized The Amazing Truth
- The Animals In This Picture Did Not Make It Across. This Is Why We Need Animal Bridges!
- This Recycle Bin in Istanbul Gives Food to Stray Animals