It’s important not to conflate two separate issues: whether meat belongs in an optimal human diet and the best ways of producing food. This writer is correct that the production of beef in intensive feedlot operations is damaging to the environment. The paper in question postulated the replacement of meat with vegetable proteins, mostly soy. The way we produce soy in the United States, with GMO seeds, chemical fertilizers and pesticides, and air polluting refineries, is also damaging to the environment. The conversation should not be about meat versus veggies, but about sustainable agriculture and a diet based on natural foods.