World Environment Day is celebrated on the 5th of June each year to raise awareness and improve actions towards protecting the environment.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/cleanliness-drive-mahananda-river-siliguri-ahead-world-environment-day
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/asian-age-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/west-bengal
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environmental-security
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ngo
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution-control
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution