Jill: link, please? Or more details?
And even if we can feed everyone, we'll need more land to do it. Which will necessitate clearing out even more natural ecosystems and devastate the environment even more. Organic food isn't nearly as good for the environment as it's made out to be.
Oh, and the food probably isn't even any healthier. (http://skeptoid.com/episodes/4019?popular=true)