Given how much one's behavior is impacted by external constraints, location does matter quite a lot. I suspect that if you moved the newborn offpsring of two morbidly obese Americans into a family on Okinawa the child would most likely live a rather healthy lifestyle.
the point, though, is not that that there is anything special in the water or something. its just circumstances that promote general health as we currently understand it. want to live longer? exercise and eat right.
