In Seattle, in the densest parts of the city are glass towers that certainly have filtered HVAC, and the poorest parts of the city are relatively low-density ar

In Seattle, in the densest parts of the city are glass towers that certainly have filtered HVAC, and the poorest parts of the city are relatively low-density areas near the port (particulates from diesel trucks and ships), the cement plant, the nucor steel plant, the highly polluted duwamish river, and boeing field. Density doesn't equal exposure.