Melting polar ice due to global warming poses an existential threat to humanity.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/home-150-million-risk-inundation
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/global-warming
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/glacial-melt
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/antarctica
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/carbon-dioxide
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/green-house-gases
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-impacts