Since the 1990s, decarbonisation has been the primary goal for many environmentalists. But there is another threat to life on Earth, one that could be just as dangerous as runaway climate change: the farming of animals for human consumption. In his new book Regenesis: Feeding the World Without Devouring the Planet, George Monbiot warns that we’re approaching a tipping point in the fight to protect the planet. Can changing what we eat bring us back from the brink? Aaron Bastani speaks Britain’s foremost environmental campaigner about eating bacteria pancakes, why rich people kill for sport, and what to do when the worst possible people are in charge at the worst possible time.