U.S. Ecosystems Threatened by Climate Change
美国生态系统受气候变化威胁

Natural ecosystems in the United States are under greater stress from climate change than at any previous time in human history, according to a new assessment by academic institutions public and private agencies. The report says these stressed ecosystems are also stressing wild plant and animal species and threatening the nation's biodiversity.
公共和私人学术研究机构的研究表明，美国的生态系统正在承受人类历史上前所未有的压力1L.QZKlLus7fEBe&1。报道称，生态系统受到压力后会给自然植物，野生动物带来生存压力，还会威胁国家的生物多样性_0KL,w15DAM4lTFrO;。