Warmer temperatures and earlier melting of sea ice are causing polar bears to go hungry. The number of undernourished bears has tripled in a 20-year period.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/more-polar-bears-going-hungry
[2] http://admin.indiaenvironmentportal.org.in/category/author/kate-ravilious
[3] http://admin.indiaenvironmentportal.org.in/category/journal/new-scientist
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/global-warming
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wildlife
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/arctic