The most visible impact of air pollution is the haze, a brownish layer of pollutants and particles from biomass burning and industrial emissions, that pervades most regions in Asia. A recent international study, the Indian Ocean Experiment (INDOEX), has revealed that this haze is transported far beyond the source region, particularly during the dry season. The discovery of the so-called Asian haze by INDOEX scientists, a 3 kilometers thick brownish layer, hovering over most of the tropical Indian Ocean, South, Southeast and East Asia is a clear evidence of the magnitude of the problem.
Links:
[1] http://admin.indiaenvironmentportal.org.in/reports-documents/concept-paper-asian-brown-clouds
[2] http://admin.indiaenvironmentportal.org.in/category/author/v-ramanathan
[3] http://admin.indiaenvironmentportal.org.in/category/author/p-j-crutzen
[4] http://admin.indiaenvironmentportal.org.in/category/publisher/unep
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indian-ocean
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/atmosphere-and-ozone-layer
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/aerosols
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/asia