自然及環(huán)保類新聞單幅獲獎(jiǎng)?wù)掌?金獎(jiǎng) 同類相殘  A male polar bear carries the head of a polar bear cub it killed and cannibalized in an area about 300 km (186 miles) north of the Canadian town of Churchill in this picture taken November 20, 2009. Climate change has turned some polar bears into cannibals as global warming melts their Arctic ice hunting grounds, reducing the polar bear population, according to a U.S.-led global scientific study on the impacts of climate change. 同類相殘 POLAR BEAR AND GLOBAL WARMING 2009年11月20日，在加拿大丘吉爾鎮(zhèn)以北約300公里的地方，一頭雄性北極熊咬著一直小北極熊的頭。隨著氣候變暖，北極熊的食物來(lái)源匱乏，同類相殘?jiān)絹?lái)越普遍。 ?
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