To understand the real picture of the cleanliness of the air in your area, you can use online tools.
Air pollution detector based on a cell phone: development from Germany
In any more or less large industrial city and its surroundings, the air is polluted with a lot of suspended…
AirVisual
AirVisual is one of the most comprehensive apps available to keep you informed about your city's air quality.
Plume Air Report
Plume is designed for users who want to adjust their outdoor activities based on air quality.