Particulate matter less than PM10 and aromatic chemicals formed during incomplete combustion of organic matter are major environmental pollutants because of their toxic potential.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/exposure-vehicular-pollution-and-assessment-respiratory-function-urban-inhabitants
[2] http://admin.indiaenvironmentportal.org.in/category/author/bhaskar-prasad-chattopadhyay
[3] http://admin.indiaenvironmentportal.org.in/category/author/asitkumar-mukherjee
[4] http://admin.indiaenvironmentportal.org.in/category/author/krishnendu-mukherjee-et-al
[5] http://admin.indiaenvironmentportal.org.in/category/journal/lung
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rspm-pm-10
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/respiratory-diseases
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/congestion
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/calcutta-t
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-air-quality