Increase in obesity since 1950s correlates with increased automobile use

In the USA, for the period between 1985 and 2007, vehicle use correlated "in the 99-percent range" with national annual obesity rates. 

http://news.illinois.edu/news/11/0511obesity_SheldonJacobson.html

 

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The city of New York and Mayor Bloomberg have implemented several policies intended to help cut obesity. The latest proposal had to get USDA approval, however. The plan would take sodas out of the list of items that individuals can purchase with food stamps. The U.S. Department of Agriculture, however, has told Bloomberg that they will not approve the plan.
Source for this article: Federal food stamps can still be used to purchase soda