A well-researched look at the problem of obesity in Chicago that asks the question: when advocacy fails, what role should policy take? Is it ok to outlaw junk food, or change zoning requirements to encourage more people to walk? Is reducing car traffic not just an environmental issue, but also one of public health? (via Payton)

And there are a few pieces of fascinating trivia too: Los Angeles as a city has a higher percentage of obese people than Chicago, and the city has acquired more parkland since 1998 than in the previous 50 years.