Once considered luxury products, the need for air purifiers and air monitoring devices have exponentially increased in the last few years.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/air-and-air-everywhere-not-breath-take-how-pollution-changing-indias-lifestyle
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/zee-news
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-standards
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/who
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/centre-science-and-environment-cse