If you know much about climate change you'll know that cows and sheep produce a lot of greenhouse gas. In fact a cow can produce around 200 litres of methane a day, and methane has global warming potential 23 times greater than carbon dioxide. To put that into context thats 1.2 tonnes of greenhouse gas a year per cow, a bit over one quarter of the greenhouse gas produced by a car over a year. I once did an audit of a large business that grazed cattle basically to keep grass under control (it was … read more