As further evidence that environment is to blame, obesity has risen notably in other countries, including China, and that migrants to Western countries have much higher obesity rates than their relatives back home. Particularly vulnerable to the problem are American children. Parents can't win this battle alone. But they might stand a chance through the following proposed policy changes: Make activity more accessible, by, for example, building communities to allow more walking or biking. Regulate TV food ads aimed at children and mandate equal time for pro-nutrition messages. Ban fast foods and soft drinks from schools, instead forging school contracts with sports-related companies. Subsidize healthy foods and drive down process of fruits and vegetables by 70 percent. Such measures would take the blame off people with obesity and are the only real path to doing something constructive about this problem.

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