How can cities improve air quality?

What are some effective strategies cities can use to improve air quality?

Cities can implement strategies like increasing green spaces, promoting public transport, and regulating emissions.

How does increasing green spaces help with air quality?

Green spaces absorb pollutants and produce oxygen, which helps to purify the air and reduce urban heat.

What role does public transportation play in this?

Public transportation reduces the number of vehicles on the road, leading to lower emissions and less traffic congestion.

Are there any cities that have successfully improved their air quality?

Yes, cities like Barcelona and Los Angeles have implemented measures that significantly improved their air quality over the years.