KOLKATA: The city is experiencing its foulest spell of pollution in recent years with the air quality index considerably worse than previous years.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/air-quality-most-foul-even-green-zone
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-kolkata
[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/air-quality-index-aqi
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/national-envirnmental-engineering-research-institute-neeri
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pollution-under-control-certification
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution