环境治理论文国外研究

Water pollution and protectShortage of water resources, water resources total ranks sixth in the world, per capita consumption of only 2500m3, about the world per capita water 1/4, ranked 110 in the world, the United Nations has been listed as one of 13 water-poor countries . The extent of serious water pollution, huge losses, the country has a population of 1/4 do not meet health standards for drinking water. Water pollution directly affects the lives of our people, the living environment. The status of surface water quality is not optimistic.The survey found that 25 percent of the river showed eutrophic state, 15% are turning to eutrophication, 100% of the river water hyacinth growth, covering over 30% of the river water hyacinth, 80% of the river there is garbage, 35% of the river impassable blockage, 20% river has become stagnant.Water pollution is due to pollutants than self-purification capacity of the river caused. According to the survey, residents of poor awareness of the protection of water resources, the garbage directly into the river, home to the toilet waste directly into the river; agricultural water, the water containing pesticides and fertilizers drain into the river; individual private factories, at the expense of environmental interests the economic benefits, causing serious water pollution.Water pollution directly affect people's lives and production. Conducted using contaminated water for agricultural production will result in cuts; river water hyacinth, blocking the river so that boats can not pass; pollution will make people sick, such as diarrhea, skin diseases, and even cause poisoning, such as Japan's Minamata Disease is one good example of the impact on fisheries production is not be ignored.A large number of facts tell us that most of our water pollution own human behavior, serious water pollution has caused great attention of governments, I think we should start now, in the governance body of water has been polluted, while protect uncontaminated water bodies and improve fundamentally human quality, and enhance the environmental awareness of humanity.puweixin usa tianmao

环境问题是人类面临的一个错综复杂的问题复合体，在这里有限的篇幅中很难把它们完全理清楚。它主要分为生态破坏、环境污染和全球变暖、臭氧层破坏、酸雨等全球性大气环境问题。在环境问题中还有另外一些较为突出的方面，如能源和资源问题、海洋污染问题、危险废物越境转移问题、城市环境问题、水资源危机、生物多样性丧失等等。以下仅就海洋污染问题作一介绍。 海洋环境问题包括两个方面：一是海洋污染，即污染物进入海洋，超过海洋的自净能力；二是海洋生态破坏，即在各种人为因素和自然因素的影响下，海洋生态环境遭到破坏。 （一）海洋污染 海洋污染物绝大部分于陆地上的生产过程。海岸活动，例如倾倒废物和港口工程建设等，也向沿岸海域排入污染物。污染物进入海洋，污染海洋环境，危害海洋生物，甚至危及人类的健康。 （二）海洋生态破坏 除海洋污染外，人类的生产活动，例如工程建设和渔业生（围垦和滥捕等），以及自然环境的变化，例如全球变暖和海平面上升，都会使海洋生态环境遭到破坏和改变。人类对某些海洋生物的过度捕捞，导致海洋生物资源数量减少，质量降低，也使部分物种濒临灭绝。有些海岸工程建设和围海造田缺乏科学论证，破坏了海岸环境和海岸带生态系统。目前，海洋开发活动还缺乏综合的、长远的规划、综合效益比较差。