I just saw this great article about the food industry. It digs into the marketing and political sides of some of the major food producers in the US. Here's the link:
http://health.usnews.com/articles/health/2008/10/17/10-things-the-food-industry-doesnt-want-you-to-know.html
If you're looking for more information on topics such as this, check out my free eBook the Dirty Health Secret.