(NBC NEWS) -- The biggest survey of American health in the past 15 years finds we're exercising more and living longer, but we are not necessarily healthier.
The survey on American health finds some U.S. cities, like New York and San Francisco, have among the highest life expectancies in the world.
Other areas, mostly in the South, are compared to third world countries.
Experts say it is a problem of excess.
Americans in the poorest parts of the country are consuming too much food, salt, and tobacco -- and as a consequence men in these areas tend to die in their mid-sixties.