Obesity Spread Likely Due To Environmental Factors

No way.

An international team of researchers' study of the spatial patterns of the spread of obesity suggests America's bulging waistlines may have more to do with collective behavior than genetics or individual choices. The team, led by City College of New York physicist Hernan Makse, found correlations between the epidemic's geography and food marketing and distribution patterns.

"We found there is a relationship between the prevalence of obesity and the growth of the supermarket economy," Professor Makse said. "While we can't claim causality because we don't know whether obesity is driven by market forces or vice versa, the obesity epidemic can't be solved by focus on individual behavior."

It absolutely can "be solved by focus on individual behavior," i.e., holding the fat accountable.

And they are right in that they "can't claim causality" since there is none.