Reactions between smog and plant proteins could explain the mysterious increases in allergies. Exhaust fumes from traffic could be turning airborne proteins into more powerful allergens, explaining
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/traffic-pollution-increases-allergic-reactions
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/deccan-herald-bangalore
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environmental-science