Intelligence Squared

This is the second instalment of our two-part debate, with George Monbiot, Guardian columnist, environmental campaigner and author of Regenesis: Feeding the World without Devouring the Planet, arguing for the motion We Should All Go Vegan. Patrick Holden, Founder and chief executive of the Sustainable Food Trust, argues against it. Our chair is Alice Thomson, Columnist and interviewer at The Times. Livestock farming contributes 14.5% of human-produced greenhouse gas emissions worldwide. Farm animals belch out massive amounts of methane, one of the most harmful greenhouse gases. They are also extremely wasteful of resources, using up 83% of farmland worldwide while providing only 18% of our calories, guzzling soya and grain that could feed humans more efficiently, and requiring vast amounts of water. As for our health, vegan sports stars such as Venus and Serena Williams and Lewis Hamilton prove that you can be superfit on a plant-based diet, and research has linked vegan diets to lower rates of some diseases.