The organic acids present in the aerosols serve as a unique fingerprint in identifying the source of pollution.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/emissions-biomass-burning-cross-himalayas
[2] http://admin.indiaenvironmentportal.org.in/category/author/r-prasad
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/himalaya
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/south-asia
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/biomass
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/forest-fires
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/monsoons
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/atmosphere
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/atmosphere-and-ozone-layer