PATNA: The rising pollution level in the city has led to increase in the sales of air purifiers.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/pollution-air-purifier-sales-20
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-patna-0
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bihar
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-index-aqi
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control