Question

社会问题的演讲

老师要求在现在的社会问题中自由挑一个做一段评论.
已经有同学写了污染,青少年吸毒.
需要一小段,翻译成英文后可以讲3分钟的样子.
包括:现象,原因,产生的影响,解决的方法
给我拟一段中文就行了

Answer 1

温室气体
　　1.人口剧增因素
　　近年来人口的剧增是导致全球变暖的主要因素之一。同时，这也严重地危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就将是一惊人的数字，其结果就将直接导制大气中二氧化碳的含量不断地增加，这样形成的二氧化碳“温室效应”将直接影响着地球表面气候变化。
　　2.大气环境污染因素
　　目前，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。现在，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。
　　3.海洋生态环境恶化因素
　　目前，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。另外，陆地活动场所产生的大量有毒性化学废料和固体废物等不断地排入海洋；发生在海水中的重大泄(漏)油事件等以及由人类活动而引发的沿海地区生态环境的破坏等都是导致海水生态环境遭破坏的主要因素。
　　4.土地遭侵蚀、沙化等破坏因素
　　5.森林资源锐减因素
　　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。
　　6.酸雨危害因素
　　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。目前，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。
　　7.物种加速绝灭因素
　　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。但是目前地球上的生物物种正在以前所未有的速度消失。
　　8.水污染因素
　　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，本世纪以来，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，这就形成了新鲜淡水的供与需的一对矛盾。由此可见，水污染的处理将是非常地迫切和重要。
　　9.有毒废料污染因素
　　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。 Greenhouse gases
1. Population explosion factor
In recent years, the rapid increase in population led to one of the main factors of global warming. At the same time, it also seriously threatens the balance between the natural ecological environment. So many people, only its own emissions of carbon dioxide per year would be a staggering figure, the result will lead directly to the content system of atmospheric carbon dioxide is increasing, so the formation of carbon dioxide "greenhouse effect" will directly affect the Earth's surface climate change.
2. Atmospheric pollution factors
At present, the worsening of environmental pollution has posed a major global problem, but also contribute to global warming, one of the main factors. Now, with regard to global climate change research has clearly pointed out that since the beginning of last century the Earth's surface temperature has already started to rise.
3. Aggravating factor in the marine environment
At present, sea level changes are continuously showed an upward trend, according to the experts to predict the next century, sea levels could rise 50cm. If not taken and the right measures will lead directly to the destruction and pollution of freshwater resources and other adverse consequences. In addition, the land-based activities generate a large number of toxic sites and chemical waste and solid waste continuously into the sea; occurred in the major sea vent (leak) oil incidents caused by human activity, as well as the coastal areas, environmental degradation and so on led to the destruction of marine eco-environment of the main factors.
4. Land erosion, desertification and other damage factors
5. Forest Resources sharp reduction factor
Around the world, due to natural or man-made factors are causing the forest area dropped significantly.
6. Acid rain hazards
Acid rain to the ecological impact of the environment has become increasingly attracted worldwide attention. Acid rain can damage forests, acidification of lakes, endangering the biological. At present, the world's acid rain are more concentrated in Europe and North America, the majority of acid rain occurred in developed countries, some developing countries, acid rain is also rapidly and development.
7. Species extinction factor to accelerate
Life on Earth is a valuable human resources, and the diversity of human survival and development. However, the current species on the planet at an unprecedented rate.
8. Water Pollution Factors
According to the Global Environment Monitoring System Water Quality Monitoring Project showed that about 10% of the global monitoring of water pollution, this century, mankind's water consumption is rapidly increasing, while water is continuously expanding scale, which formed a fresh water supply and demand of a contradiction. This shows that water pollution would be a great to deal with urgent and important.
9. Toxic waste pollution factors
Growing toxic chemicals not only for the survival of mankind pose a serious threat, but also the ecological environment of the Earth's surface will also be harm.