Although Kerala has been a top rubber grower in India, the plant was first introduced in the Northeast by the regional forest department in the 1960s
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/threat-environment-rubber-plantations-northeast-eat-forests
[2] http://admin.indiaenvironmentportal.org.in/category/author/ankur-paliwal
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-standard-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rubber
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/trees
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environmentalists
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/north-east
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/groundwater
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/biodiversity
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/deforestation
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/land-pollution
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ecology
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environmental-security
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment