Reuters: Eating less meat can help rich nations to combat global warming but may not work for poor countries where people depend on livestock for survival, a leading expert said on Wednesday. U.N. reports show that the livestock sector accounts for about 18 percent of greenhouse gas emissions blamed for global warming — more than the transport industry. Eating less beef, pork or chicken is often advocated as a way to cut emissions. “We agree that the world as a whole could eat less …