I think you are half right on 2 counts there Stevey (technically completely right!). The junk food probably has got alot to with weight, but it's more to do with the fact that kids don't play any more. They sit around on street corners, or outside shops taunting passers by. They have parents who don't care, as long as the kids are not under their feet.

No doubt obesity is caused by many other factors too, and I'm no expert!