Source: Centre for Science and Environment.
Links:
[1] http://admin.indiaenvironmentportal.org.in/data-statistics/vital-statistics-rio
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/down-earth
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ecology
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rio-summit
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ngo
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/developing-countries
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/statistics