Five countries that created a treaty nearly four decades ago to protect polar bears through controlled hunting issued a statement that called climate change "the most important long-term threat" to the bears.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/nations-declare-climate-change-biggest-threat-polar-bears
[2] http://admin.indiaenvironmentportal.org.in/category/author/andrew-c-revkin
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/international-herald-tribune-bangkok
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/canada
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/global-warming
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wildlife
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/denmark
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/norway
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/russia
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us