USA has the largest junk food industry. The fast food industry is worth 223 billion $ and keep growing. One third of us population is overweight.
That is what I have noticed since the begining of my trip. There is food literally EVERYWHERE, even in stores who aren't supposed to sell food, like Bed Bath & Beyond. You can buy food everywhere, in every store. People are encouraged all day on buying more and more food.
But more and more poeple try to change their bad habits and avoid buying junk food. That is why places like Wholefood are more frequently visited. It is grocery store where you can buy high quality food, healthy and organic food.