So why do ag economists at U MN say 80% of our Minnesota dairy farmers will/should stop dairy farming? They cannot beat the cost of production of mega-dairies in western states. We have 3,000+ dairy farmers left. Based on this, we should have 600 or so left, vastly increased in size. Environment? Soil? Water? Diversity? Animal health? Consolidated markets and distribution chains pick cheap every time. We overproduce. Cheap wins in the USA dairy market. Externalities abound. There is no mechanism in our "leading market system" to price or value externalities, except for a small organic sector, that is now being degraded by industrial "organics".