Cars, industrial equipment, and things like HVAC systems all play a big role. Racism was definitely the primary motivator of White flight for the cities, but I

Cars, industrial equipment, and things like HVAC systems all play a big role. Racism was definitely the primary motivator of White flight for the cities, but I also wonder to what extent people just wanted to get away from industrial noise pollution, which surely must have been at a peak during that era.