I'd like to add that it's not only what people do at work or at school, but how they get to work and how they get to school. Forty years ago most children were walking to school. There are issues with urban planning. We need dense areas with a lot of destinations mixed in and safe roads. So there are a lot of issues with urban planning and road safety too, in order to go to school or to go to work either using public transit or walking or cycling.
Thanks.