https://www.youtube.com/watch?v=JWKa9DWSlz4&feature=youtu.be

Must watch talk! It reframes the debate over the future of food and dispels the myth that we will feed 9 billion by expanding industrial agriculture. 

Ending poverty and inequality, not expanding yield per acre, is the key issue in the food system. A wonderful factoid from the talk: industrial farmers uses 70% of the resources consumed in food production to create 30% of the world's food, while small holder farmers produce 70% of the world's food using only 30% of the resources. Fossil fuel for machines, fertilizers and chemicals are resource intensive and the key factor in the difference between the two worlds. 

This reality clarifies that in a world of global warming and resource depletion, industrial ag will never be able to feed the world. It requires too may resources to produce food.