Looking at two neighborhoods in a city, we see a common theme that may seem like common sense: busy streets produce more pollution. But we also see how freeway overpasses, busy intersections, and stop-and-go traffic on streets can contribute to pollution spikes.
Our cities and buildings are dynamic, living systems. Millions of residents go about their lives making transportation and energy choices, like riding bikes through the park or sitting in traffic. Adding weather to this mix of individual and collective activities creates shifts in air quality patterns throughout a day, a week, months, or years.
