Air pollution is one of the causes of lung cancer, especially in places where it involves PM 2.5 (Particulate Matter that is 2.5 micrometers in diameter or smaller).

Particle Pollution (PM)

https://airnow.gov/index.cfm?action=aqibasics.particle

Texas figures

https://www.tceq.texas.gov/cgi-bin/compliance/monops/select_curlev.pl?user_param=88502