A new study says beef production is very damaging the environment. It damages the environment around ten times more than the production pork, lamb, chicken or other farm animals. Scientists said cows need 28 times more land and 11 times more water than pigs, sheep or chickens. They also produce a lot greenhouse gas they eat. Compared food like potatoes, wheat, and rice, beef production needs 160 times more land and produces 11 times more greenhouse gases. The scientists said farming ( livestock and crops) is a major cause global warming. It causes 15 per cent all greenhouse gases. About half this is livestock. One scientist said we could all reduce our carbon footprint eating less beef. Professor Mark Sutton the Centre Ecology and Hydrology in the UK said cutting on the amount beef we eat is better the environment than using the car less. He also said that if we ate less beef, we could use the wheat that farmers give to cows to feed starving people. He said this sounds simple, but many governments would not try to do it. Professor Sutton said: "Governments should consider these messages carefully if they want to improve overall production." He added: "The message the consumer is even stronger. Avoiding excessive meat consumption, especially beef, is good the environment."