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→Population and Protection: Hunters killed off so many of them...
==Population and Protection==
==Population and Protection==
In the 1960s and 1970s, hunting had a major impact on the bear population, reducing the population to levels that prompted the five nations with polar bear populations to create and sign the International Agreement on the Conservation of Polar Bears in 1973.<ref name="bearfacts">Polar Bears International: [http://www.polarbearsinternational.org/bear-facts/ Bear Facts]</ref>
In the 1960s and 1970s, polar population fell to levels that prompted the five nations with polar bear populations to create and sign the International Agreement on the Conservation of Polar Bears in 1973.<ref name="bearfacts">Polar Bears International: [http://www.polarbearsinternational.org/bear-facts/ Bear Facts]</ref>
The population drop was due to hunting.
Since these conservation efforts had been made, the world population rose to an estimated 22-27,000,<ref>Nature Canada: [http://www.naturecanada.ca/climate_change_polar.asp Climate Change and Polar Bears]</ref> even though there is no adequte census.<ref name="bearfacts"/>
Since these conservation efforts had been made, the world population rose to an estimated 22-27,000,<ref>Nature Canada: [http://www.naturecanada.ca/climate_change_polar.asp Climate Change and Polar Bears]</ref> even though there is no adequte census.<ref name="bearfacts"/>