Air pollution removal by buildings

The word “smog” is a combination of “smoke” and “fog” Car traffic causes smog, because dust from for example car tires and asphalt mixes with car fumes and air. If completely preventing smog is impossible, air pollutants air can be removed. This is how: https://medium.com/@ErlijnG/how-buildings-can-be-turned-into-air-pollution-eaters-42a5793d233b

Special coatings cannot only remove air pollutants, they can also clean themselves (credit: image based on picture by dymaxfoto on Shutterstock)