A review of evidence from around the world shows that reducing air pollution in homes, cities or countries has a dramatic effect on health almost immediately
Source:
https://www.newscientist.com/article/2226280-measures-to-reduce-air-pollution-quickly-result-in-big-health-benefits/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home