Empty calories are cheap, though. You can still find a 900 calorie bottle of soda or a 1500 calorie family-size bag of chips for $1-2, both of which are things an uneducated teenager can tear through without a second thought. And that's not even factoring in things like snack cakes, which I've seen go as high as 400 cals each...My point is, the "healthy food is too expensive" argument is generally bullshit but the "junk food is cheap and easily available" side of it isn't.