关于水的污染的英语论文,500字左右 急需 急需 急需 谢谢好心人
I'm wangNan,a student of No.1 Middle School. I have a gooa friend,Jim.He' an USA girl.We are both in Class Two,Grade Eight.She is 15 years old,one year older than me. We both study hard.I'm good at physices,but she's good at math.We often help each other with lessons.Both of us like helping others. We both like sports very much.Jim enjoy playing basketball.but Ilike palying soccer. She likes green but Ilike red. Tough we are different in my ways,we are good friends
Water pollution and protect
Shortage 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.
这回呢,这是关于水污染的,如果需要还可以自己加一些案例什么的,但是字数应该会超过了。。
望采纳~~~~~
There are various categories of environmental pollution:
Divided by environmental factors: air pollution, water pollution, soil pollution.
Divided by human activities: industrial pollution, urban environmental pollution, agricultural pollution.
Environmental pollution caused by nature, source: chemical pollution, biological contamination, physical pollution (noise pollution, radiation, electromagnetic waves) of solid waste pollution, energy and pollution.
One of the most serious water pollution.
So far, not in human on the planet other than Earth found in water. Water is the source of life, human life is not a lack of material, human tissue in the body of water accounts for sixty to seventy percent by weight, other animals or plants also account for the body of water more than five per cent, shows that water is essential to sustain life material.
In recent years, water pollution is very serious, it is a lot of water, or discharge of waste water, can cause serious water pollution.
Commonly known as the water pollution, mainly due to human factors that directly or indirectly involved in the pollutants in the water, the changes in its physical, chemical or biological characteristics of the change, which affects the normal use of water or endangers public health and living environment.
Water pollution sources, including natural sources and anthropogenic sources of pollution, man-made sources of pollution are domestic and industrial wastewater discharges, pesticides, fertilizers and other substances, by surface water or groundwater infiltration and flow and into the water, making the water environment pollution, forest of logging, farming, civil engineering caused by human factors such as plankton and dissolved in water increases and so on.
Not only rivers, lakes, pollution, marine pollution is also serious. Polluted rivers will continue to pollute the ocean, and marine oil pollution incidents occur frequently, but also a major cause of marine pollution. Marine pollution arising after suffering a severe red tide marine phenomenon is due to over-nutrition of sea water, some of the explosive reproduction of plankton in the water, this extraordinarily large plankton growth is pink or reddish-brown, so dyed water, leading to red tides. Red Tide is not only to the marine environment, marine fisheries and aquaculture cause serious harm, but also affects both human health and even life. On the one hand, red tide, ocean mutation caused partial disruption of marine food chain, so that became the Dead Sea area; the other hand, some of red tide organisms secrete toxins, these toxins are some of the food chain biological intake, and then if the human consumption of these organisms, the will lead to poisoning or even death.
The cause of water pollution is a serious lack of one of the main. According to statistics, more than 100 countries around the world there are different degrees of water shortage, including 28 countries classified as water-scarce countries or serious water-scarce countries. Currently there are many parts of the world's water supply crisis.
The lack of water resources and pollution to people's lives a series of problems. According to the survey, Libya and India, respectively, the current exploitation of water resources rational utilization of their 4 times and twice, it will directly affect their future agricultural production. Bangkok, Thailand due to the long over-exploitation of groundwater, resulting in the risk of urban ground subsidence occurred ... ... With the acceleration of urbanization, 2030, the urban population in developing countries increased by 3 times than now. If you do not take effective measures, the face of urban population growth and very limited water resources, people will do nothing. Currently, 1.4 billion people worldwide live in areas where lack of clean drinking water, 700 million people worldwide each year due to lack of water or drink unsafe water and disease deaths. And residents suffering from the disease, about 80% of unqualified drinking water directly or indirectly related.
China is a shortage of water resources, water, disaster-prone countries, ranking sixth in total water resources per capita is only 2,500 cubic meters, about the world's per capita water 1 / 4, ranked 110th in the world, has been the United Nations as one of 13 water-poor countries.
Over the years, the declining quality of water resources, water environment continued to deteriorate, due to pollution and accidents caused by water shortages continue to occur, not only factories closed and agricultural production or crops, and resulted in adverse social impacts and the larger economy loss, a serious threat to the sustainable development of society and threaten the survival of humanity. China's seven major river systems of the size of the degree of pollution in order to sort the pollution levels, the result is: the Liaohe, Haihe, Huaihe River, Yellow River, Songhua River, the Yangtze River, which, Liaohe, Haihe, Huaihe River pollution the most. Considering the status of surface water quality, in line with "Surface Water Environmental Quality Standard" Ⅰ, Ⅱ class standard only 32.2% (river statistics), in line with the standard Class Ⅲ 28.9%, are Ⅳ, Ⅴ standard accounting class 38.9%, if Ⅲ standard and as pollution statistics, the 67.8% of the length of the river is polluted, accounting for monitoring the length of the river 2 / 3, showing a very serious pollution of surface water resources
Serious pollution of surface water resources, pollution of groundwater resources can not be optimistic?
Five provinces in northern China and the Haihe River Basin groundwater resources, both in rural (including pastoral areas) or urban areas, shallow water or deep water are polluted in varying degrees in some areas (mainly around the city, the sewage and wastewater irrigation on both sides of river ) and part of the city's more serious groundwater pollution, pollution, the rise (Jinchuan Liang, 1996).
Specifically, according to the five northern provinces and autonomous regions (Xinjiang, Gansu, Qinghai, Ningxia, Inner Mongolia) 1995 points of groundwater monitoring well water quality data, in accordance with the "water quality standards" (GB/T14848-93) evaluation, the results show that 69 cities, Ⅰ water quality in the city does not exist, Ⅱ water quality in the city is only 10, only 14.5%, Ⅲ Grade 22 cities, accounting for 31.9%, Ⅳ, Ⅵ Grade 37 cities, accounted for 53.6% of the total evaluation of the city, that is 1 / 2 or more cities, urban groundwater pollution. The Haihe River Basin, groundwater pollution is even more shocking, 2 015 points of groundwater monitoring wells show that water quality monitoring data, in line Ⅰ - Ⅲ water quality standard is only 443, accounting for 22.0% of the total evaluation, in line with Grade Ⅳ and Ⅵ Standards 880 and 629, respectively, accounting for evaluation of the total number of wells 43.7% and 34.3%, or 78% of the groundwater is polluted; if drinking water standards for evaluation, the total number of wells in the evaluation, only 328 hole water quality standard of living, accounting for only 31.2% of the total evaluation, the other 2 / 3 of the monitoring wells for drinking water quality does not meet the standard of life.
In order to promote integrated water resources planning and management, strengthening protection of water resources, to solve the increasingly serious water problems, carrying out extensive publicity to raise public awareness of development and protection of water resources, January 18, 1993, 47th United Nations General Assembly since 1993, each year on March 22 as World Water Day.
Facing a serious water shortage, water pollution problems, we should take action and treasure every drop of water, take water-saving technology, pollution control, afforestation and other measures, rational use and protection of water resources.
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