Getting a device that measures pollution turns nameless fears into numbers. Doubt turns into a quantitative fact. Air turns certifiably into poison. Some illusions die quickly.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/breathing-time-pollution
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/west-bengal
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cancer
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pm-25