if you go to a drugstore like duane reid, it looks like a grocery store now. there's food at bed bath and beyond. there's food at staples. there's food everywhere. it used to be that libraries wouldn't allow any kind of food anywhere near the library. now every library has a cafÉ in it. so these are ways of selling food. and we're humans. humans eat when food is in front of us. and the more times we see food a day, the more food we eat. >> host: you write in your book, "food politics," food companies will market any product that sells regardless of its nutritional value or its effects on health. >> guest: i did say that, and take coca-cola, for example, as a, you know, sort of random example. the soda industry is under enormous pressure from health authorities right now because it's sugar water. it's not only sugar and no newt represents, but it's sugars in liquid form which may have their own metabolick difficult -- met baa lollic difficulties. so, yes, millions of dollars go into marketing coca-cola every year, and people would be much healthier if they didn