I'm probably like a lot of people. I buy organic produce when I can because it tastes better, but don't worry too much about the ingredients in other foods. The manufacturers have too much to lose to mess up, right?
You would think so, but apparently some genius in China decided that spiking vegetable proteins with fertilizer was an easy way to boost profits. (The fertilizer increases the apparent protein content, and therefore the selling price.)
The whole foods advocates do have a point: if you cook your own food from fresh ingredients, you can be pretty sure about what's in it.
Oh, wait. Wasn't there something about E. coli contamination of fresh spinach? Sigh...