Imagine two 9 year-old children. One gets driven across town to a school that his parents find best fits his learning needs, or social values, or cultural community. He barely knows the kids on the street where he lives, as they all go to other schools. He sits in traffic everyday, contributing carbon to the atmosphere and pollutants to the city air. The other child walks to the local primary school, joining friends along the way, kicking stones down the sidewalk, plucking leaves from the hedge, learning to avoid dangerous street crossings and engaging in little mischiefs. Obviously, I exaggerate and simplify. But the point I wish to make is that the impacts of school choice (or school vouchers, or proliferating private schools) on traffic, air quality, carbon emissions, health, family time, and neighbourhood cohesion are far from sufficiently discussed in debates over school choice.