Today, it is increasingly recognized that air pollution hurts human health. Consequently, efficient mitigation strategies need to be implemented for substantial environmental and health co-benefits. Developing and implementing creative, innovative approaches to improving air quality is essential, especially in places that tend to suffer from disproportionately high air pollution. Nitrogen dioxide (NO2) is one major air pollutant of concern in regard to urban air quality. Nitrogen dioxide pollution stays mostly concentrated in the area where it is emitted, meaning that areas with high vehicle traffic like urban areas tend to have the highest NO2 levels. Following are the ways to control the air pollution in urban,
1. Encourage Sustainable / Public Transportation.
2. Enhance Industrial Emission Controls. ...
3. Promote Sustainable Construction Practices.
4. Promote Energy Efficiency.
5. Switch to a renewable energy plan
6. Implement Green Spaces and Urban Planning.
7. Improve Vehicle Efficiency – Ways to Reduce Air Pollution in Cities
8. Raise Awareness and Educate
9. Sstrengthen Waste Management Practices
10. Collaborate and Advocate for Change
11. Implement Air Quality Monitoring
12. Use public transportation
13. Walk and cycle more
14. Carpool or ride-share
15. Use an electric vehicle
16. Buy local products and produce
17. Join urban gardening initiatives
18. Adopt green roofs for your house or your factory
19. Write to your city government to ask about air quality data and clean air actions
I agree with Arvind Singh that the above reference is relevant. But there are other things: 1) stagnation of air and consequently pollutant accumulation depends on the building configuration and the ventilation in the urban canyon,
Ref. Huang et al. 2021 A review of strategies for mitigating roadside air pollution in urban street canyons. Env. Pollution. Doi: 10.1016/j.envpol.2021.116971
2) there are emerging pollutants and issues (i.e. non-classical pollutants such as ultra-fine particles, black carbon, NH3, butadiene, formaldehyde, man-made nano-particles, fragrance products, microplastics, etc.) which deserves more attention and there are causing perhaps more health/environmental problems that previously suspected and should be part of future policies and strategies. Unfortunately, current policies look at old issues and focus too much on regulated pollutants (Ozone, NOx, So2, carbon monoxide, PM2.5 aerosols, etc.)
Ref. An overview of selected emerging outdoor airborne pollutants and air quality issues: The need to reduce uncertainty about environmental and human impacts.