Problem: Air quality varies from location to location, even within blocks of each other. People who are very sensitive to air quality may be affected negatively, as they go from one area to another.

Solution tested: Air quality and environmental sensors, Notification system

Questions to be answered: How does the air quality levels change from location to location? How large are the differences? What causes the differences in local air quality? What changes, small or large, can we make to change the local air quality? Are there better paths for people to walk, run or bike than others?