dr t. colin campbell professor emeritus of nutritional biochemistry of nutritional biochemistry at cornell university. he's the author of the international bestseller the china study and his latest book is whole rethinking the science of nutrition it's in bookstores now dr campbell advocates a plant based whole food diet americans of fatter than ever the u.s. center for disease control predicts that forty two of a percent of americans will be obese by twenty thirty is this a major calamity dr absolutely if we look at the number of people that are rated as either obese or overweight the united states we're looking at about two thirds of the adult population so i cat the bottom line is it's cheap and healthy mix with that in terry diet if you walk into any grocery store with a dollar going to be able to buy more calories and process they than you can and fresh vegetables there that's an issue we're in a big pickle when you can do that are we living with misconceptions dr campbell obesity we tend to think of it as a separate disease when in reality from my perspective in research this is an i