This headline was in the news this week: Organic food not healthier, study finds (Reuters, 30 July ’09).
You guessed it, I believe this headline is misleading. “Not more nutritious” would be more accurate, though even this overlooks the evidence that some organic food is indeed more nutritious (milk example).
But my main point is that organic food is healthier in other ways. Organic farming releases fewer pollutants into our air, soil and water; pollutants that affect humans and animals. And there is also the issue of genetically modified organisms.
For more, you can start with this essay I wrote a few years ago and by watching The Future of Food. The Power of Community also speaks indirectly to this issue by looking at the sustainability of modern farming which depends heavily on cheap oil.
And these are good reading: