Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/tipping-elements-earths-climate-system
[2] http://admin.indiaenvironmentportal.org.in/category/author/timothy-m-lenton
[3] http://admin.indiaenvironmentportal.org.in/category/author/hermann-held
[4] http://admin.indiaenvironmentportal.org.in/category/author/elmar-kriegler-et-al
[5] http://admin.indiaenvironmentportal.org.in/category/journal/proceedings-national-academy-sciences
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/atmosphere-and-ozone-layer
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-science
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-impacts