Researchers have found strong evidence that environmental exposures, including air pollution, affect gene expressions associated with respiratory diseases much more than genetic ancestry.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/environmental-exposures-such-air-pollution-are-more-determinant-respiratory-health-inherited
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/environment-news-network-us
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/respiratory-diseases
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cancer