温室效应(或全球变暖)。全球变暖的主要原因是人类向大气排放的二氧化碳越来越多，其中，美国是第一大国，中国是第二大国。最主要的危害就是导致南北两极的冰盖融化，使海平面上升。据科学家计算，如果人类对二氧化碳的排放不加限制，到本世纪末，全球气温上升2~5摄氏度，海平面上升30~ 100厘米。由此会带来灾难性后果
物种灭绝。目前地球正在经历着第六次大规模的物种灭绝。由于人类对野生生物的狂捕杀，对生态环境的污染和破坏，使得地球上越来越多的物种已经或正在遭遇灭顶之灾。
The Greenhouse Effect(The Global Warming);The main reason of The Global Warming is more and more carbon dioxide Discharge by human being, USA is No.1 listed in it and then China. The most jeopardize is causes the north and south the two-pole ice melting, causes the sea level rising. According to the scientist statistics：At the end of the century,The global temperature rises 2—5℃，The sea level rises 30-100CM If Do not control carbon dioxide emission, It will make a disaster outcome--The species extermination. For the time being, The Earth is experiencing the sixth species extermination. The reason is The humanity crazily kills The wild biology,Ecological environment pollution and destroy by, Making more and more species already or being extermination.
温馨提示：答案为网友推荐，仅供参考
