1) More research into sustainable farming techniques 2) More research into automation that makes these sustainable techniques feasible at a market cost
Unfortunately, the companies that can afford to do that research are too busy using their money to genetically modify their crops and pump their livestock full of drugs.
If the government forced these guys to cut back through sanctions, the cheapest food might not be the most unhealthy anymore. Issues of environmental and public health concerns are one area where I actually agree with stronger governmental powers vs corporations - people won't vote with the dollars because it's a) necessary to live and b) they usually live so far away from the heinous conditions that they don't even know about it - or worse, don't care.