原因分析
人为因素
1.人口剧增因素Dramatic increase in the population
人口的剧增是导致全球变暖的主要因素之一。同时，这也严重地威胁着自然生态环境间的平衡。这样多的人口，每年仅自身排放的二氧化碳量就将是一惊人的数字，其结果就将直接导致大气中二氧化碳的含量不断地增加。
The population factor is one of the main reasons in global warming. At the same time, this is a serious danger to the balance between natural environment. So large the population is, each year only the amounts of their own carbon dioxide emissions would be a staggering figure. And th2016金曲奖is result will lead directly to the increase of carbon dioxide in the atmosphere.
2.大气环境污染因素Environmental factors
环境污染的日趋严重已构成一全球性重大问题，同时也是导致全球变暖的主要因素之一。21世纪，关于全球气候变化的研究已经明确指出了自上个世纪末起地球表面的温度就已经开始上升。
Nowadays environmental pollution has turned major global problem, also lead to global warming. Now, global climate change research has clearly pointed out that since the end of last century , the Earth's surface temperature has begun to increase .
新能源车保费上涨3.海洋生态环境恶化因素Deterioration of the marine environment factors
海平面的变化是呈不断地上升趋势，根据有关专家的预测到下个世纪中叶，海平面可能升高50cm。如不采取及对措施，将直接导致淡水资源的破坏和污染等不良后果。
At present, the sea-level was constantly on the rise, according to the experts forecast ,at the middle of the next century, sea levels could rise by 50cm. And if we do not take measures, that will lead to the damage and pollution of fresh water resources .
4.土地遭破坏因素The land damage factors
众所周知良好的植被能保持水土流失。但人类活动由于为获取木材而过度砍伐森林、开垦土地用于农业生产以及过度放牧等原因，仍在对植被进行着严重的破坏,可能造成大范围洪涝灾害和沙尘暴，给社会造成重大经济损失，并恶化生态环境。
As is known to all, a good vegetation can prevent the soil and water loss. But due to human activities to get wood and cut down forest, cultivate land for agricultural production, there is still much serious damage to vegetation. And it 新闻传播学can cause floods and dust storms, cause great economic loss to the society and worsen natural 古代神话故事有哪些environment.
5.森林资源锐减因素the sharp drop in forest resources factor
在世界范围内，由于受自然或人为的因素而造成森林面积正在大幅度地锐减。
Due to natural or man-made factors, forest resources around the world is significantly reduced.
6.酸雨危害因素Acid rain
酸雨给生态环境所带来的影响已越来越受到全世界的关注。酸雨能毁坏森林，酸化湖泊，危及生物等。世界上酸雨多集中在欧洲和北美洲，多数酸雨发生在发达国家，一些发展中国家，酸雨也在迅速发生、发展。
Acid rain’s impact on the environment has drawn more and more attention around the world. Acid rain can do damage to forests, lakes and threaten the biological. At present, acid rain occurred in most developed countries, but in some developing countries, acid rain also happened rapidly.
7.物种加速灭绝因素Speed up the extinction of species on Earth's biological factor
地球上的生物是人类的一项宝贵资源，而生物的多样性是人类赖以生存和发展的基础。但是地球上的生物物种正在以前所未有的速度消失。
Biological species on Earth's is a valuable resources and biological diversity of species is the basis of human existence and development. However, the biological species on earth is disappearing at an unprecedented rate.
8.水污染因素Water Pollution factors
据全球环境监测系统水质监测项目表明，全球大约有10%的监测河水受到污染。人类的用水量正在急剧地增加，同时水污染规模也正在不断地扩大。由此可见，水污染的处理将是非常地迫切和重要。
According to the Global Environment Monitoring System of私家车使用年限 water, about 10% river water is polluted. Water consumption is in a sharp increase , water pollution is becoming more and more serious.This shows that taking measures to protect water will be very important and urgent.
9.有毒废料污染因素 Toxic waste factor
不断增长的有毒化学品不仅对人类的生存构成严重的威胁，而且对地球表面的生态环境也将带来危害。
The growing number of toxic chemicals not only 团员自我评议threaten human survival, but also damage the earth's surface environment .
自然因素
1.火山活动Volcanic activity
2.地球周期性公转轨迹变动The earth periodic track changes
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