Climate change means ice, where polar bears are most at home, is melting earlier in the year and so polar bears have to spend longer on land, scientists say.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/polar-bears-crowd-russian-island-sign-arctic-change
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-live-south-africa
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-impacts
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/arctic
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/global-warming
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/glacial-melt