An article in Forbes, dated October 9th, investigates organic agriculture. The author finds that organic agriculture is significantly less productive per unit of land, which is not a new result. Some math shows that converting all agriculture to organic would require over 100 million acres of land to be converted to agriculture. The article's brief but informative and features lots of charts, graphs, and pictures: take a look.
That reminds me of another link I've been meaning to post for awhile: another exposé on factory farms. Packing a lot of animals into a small area yields cheap meat, but it also yields nasty bacteria and huge amounts of waste that aren't easily disposed of. Guess who isn't interested in building a new sewage treatment plant to clean up the waste? Yeah.