In January, the US Fish and Wildlife Service proposed listing the polar bear as a threatened species under the Endangered Species Act, noting polar bears depended on sea ice as a platform to hunt seals, their main prey.

• 今年1月，美国鱼类及野生动物保护局提议将北极熊列入《濒危物种法案》的濒危物种名单，并指出北极熊主要依靠海冰这一“平台”来捕食海豹。