If you likes How Wolves Change Rivers, check out How Whales Change Climate: https://www.youtube.com/watch?v=M18HxXve3CM For more from George Monbiot, visit http://www.monbiot.com/ and for more on "rewilding" visit http://bit.ly/1hKGemK and/or check out George Monbiot's book Feral: rewilding the land, the sea and human life: http://amzn.to/1fjgirx NOTE: There are "elk" pictured in this video when the narrator is referring to "deer."