Nearly 4.25 million hectares are under threat from the deadly weed parthenium, which, if controlled, can raise India
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/deadly-parthenium-weed-invades-indias-farmlands
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/weeds
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/parthenium