There numerous articles about it. From an environment point of view, it is necessary due to the massive amount of food and necessary in addition to all the greenhouse gasses released by cattle. Water probably is the biggest issue but it will have to happen. What will happen when California runs dry? It is happening based on satellite imagery. Same in India. 12.5% of greenhouse gas emission comes from cattle. Meat is going to get really expensive at some point due to the demand for fresh water. We have it cheap here due to farmers have cheap access to water and subsidies but without those beef would be $10-12 a lb. How many can afford beef if the price rose to $20-30 lbs?