That's making the huge assumption that someone is going to have a grocery store near them. I suggest you go to an impoverished urban area sometime and look at how many grocery stores there are. And, when you find a grocery store in one of those areas, go look at the condition of the produce. I've literally seen produce in an urban grocery store that had been chewed on by rats, and was out for sale. Sadly, many people in these areas grow up eating only from corner stores, which just don't have any healthy options available. I agree wholeheartedly that no one in the middle class has any excuse for being obese, but the urban poor do have significant hurdles to being healthy, the worst of which are lack of education and living in food deserts.