TriplePundit argues sustainable agriculture will remain a dream so long as the cost of concentrated animal feedlot operations (CAFO) is externalized.

The point is:

"The externalities of a business like a CAFO include the air and water pollution, public health problems associated not just with their industrial waste but also in antibiotic resistance, obesity caused by meats laden with chemicals and grown in conditions that produce weight in the fastest manner possible, and other health problems arising from their unhealthy products. And, of course, creating an environment in which disease like the swine flu can flourish, mutate, and multiply."