Well, regardless of the mechanism by which fast food is contributing towards health problems...
I encourage every one who has kids or is planning to, to steer them away from junk food. And encourage your friends and family to, as well.
I also encourage you to listen to the NPR science Friday podcast on the US dependence on the corn industry and its relation to fast food, and on the industrialization of the food industry. Among other things, mass-production of meat and fish means antibiotics in our food. A recent study found arsenic in most chicken (saw a story on the local news, but you can read another story about it here http://www.goveg.com/contamination.asp) because of mass production chicken coops, and all the chick-filets and costco rotissiere's that 'must be' produced.
Anyway, since no one else has mentioned it, I guess I wll ask: haven't we gotten a bit off topic? Doesn't seem like this is about the corolla anymore.