Sorry to keep derailing this thread, but...

There are large scale "corporate farms," and there are small scale "family farms." And probably everything in between. The difference between the two is that it's almost impossible to operate the former without the use of a lot of heavy machinery, chemical pesticides/fungicides/herbicides/fertilizers, flood or spray irrigation, government subsidies... all of which are not sustainable, both environmentally and economically. Small scale farms are much more likely to be diversified, organic, and sustainable. Could these products cost more at the register? Most likely they will. But the benefits far outweigh the costs, IMO. In fact, if the produce you buy from the local farmer's market is fresher, it should have a longer shelf life, and that should help offset the slightly higher cost.