Who is to blame for the rise of childhood obesity?

All of us: Like many things in life this one is multifactorial. Kids spend less time running and playing. Cheaper high carbohydrate foods are so much easier to get rather than healthy stuff. Both parents working thus easier to hit mcdonald's instead of a home cooked meal. I could go on forever but that won't solve the problem. Lead by example: eat healthier, walk a little more. No hypocrisy!