Here is a good article on the water problem in California. I have used the almond as an example. However, we grow rice, alfalfa, walnuts, and many other nuts and vegetables, all needing immense amounts of water. No – we can’t stop agriculture, of course not. But water should be traded like any commodity on the free market. If water were more expensive, we would not grow rice in California so we can ship it to Asia. That makes no sense.