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Question

5.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。

6.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。

7.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。

Answer 1

5. Acid rain hazards

Acid rain to the impact of the ecological environment has become increasingly attracted worldwide attention. Acid rain can damage forests, acidification of lakes, endangering biology. Currently, the world's acid rain, mostly in Europe and North America, most acid rain occurred in developed countries, some developing countries, acid rain is also rapidly develop.

6. Species extinction factor to accelerate

On Earth is a precious human resources, biological diversity is the basis for the survival and development. However, the biological species on Earth is disappearing at an unprecedented rate.

7. Water Pollution Factors

According to the Global Environment Monitoring System Water Quality Monitoring Project showed that about 10% of global water pollution monitor, in this century, mankind's water consumption is increasing rapidly, while water pollution is also continuously expanding the scale, which formed a fresh water supply and demand of a contradiction. Thus, treatment of water pollution will be very to the urgent and important.