What do we know about design and health?

The Atlantic has a nice piece today emphasizing that despite some strong beliefs, "We Don't Know Nearly As Much About the Link Between Public Health and Urban Planning As We Think We Do."The impetus for the piece is a report on The State of Health + Urbanism by MIT's 10 year long Health and Urbanism Initiative. The more we study it, the more we see that we need to study it. And yet, what we do know, tends to be more about specific American cities. Imagine how little we know about the new megacities in other parts of the world.