지난해엔 북극곰들이 관측된 지점들의 얼음이 초가을부터 얼기 시작해 오래 유지되는 등 환경이 좋아졌다고 설명했다.
He explained last year that the environment had improved because the ice at the locations where polar bears were observed began to freeze in early autumn and lasted for a long time.