Scientists have yet to discover, or classify, about 90 percent of the plant and animal species on Earth, which is estimated to be home to just under 9 million species, a study says.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/how-many-species-earth-87-million-give-or-take
[2] http://admin.indiaenvironmentportal.org.in/category/author/david-fogarty
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/planet-ark-australia
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/biodiversity
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-resources
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/extinct-species
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pollution
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change