Water_Pollution水污染英文(课堂PPT)
water pollution(水污染、环境保护)有相应PPT
Good afternoon, ladies and gentleman! I am glad to stand here to take my presentation. Today I would like to talk about one important thing in our life—water! As the content shown, my presentation is divided into five sections.First, let’s discuss the signification of water! "No water, no creatures" It's true that the human beings will run the end if there is no water in the world. Man can live for about 7 days without any food, but could you live for more than 3 days without water? I guess your answer is no! C omprising over 70% of the Earth’s surface, water is undoubtedly the most precious natural resource that exists on our planet. Without the seemingly invaluable compound comprised of hydrogen and oxygen, life on Earth would be non-existent: it is essential for everything on our planet to grow and prosper.Although we as humans recognize this fact, we disregard it by polluting our rivers, lakes, and oceans. My dear friends, do you still remember the clear stream near your house when you were a child? When we were children, the stream was so clean that we can even see our image upon the water surface. When we were children, we used to go swimming and capture fishes in the river. When we were children, each family drank from it. But now, a few things changed gradually. The clean stream was disappear and replaced by a dirty river.So why does this matter? Let’s seek the answers from the picture! Ascan be seen from the cartoon, industrial effluent, agricultural chemicals and domestic waste water was discharged directly into the river, which make the water dirty. People who make the water clean through water purification plant drink the water from this river. However, the animals that live in this river are unlucky and miserable. They said angrily. “Hey! Think about us, too!”No doubt, there are many factors that lead to water pollution. Let's take a proper look at three main causes of water pollution.On one hand, the waste from the industries or factories contributes a lot to the problem of water pollution. They use injection wells to insert all the harmful and insolvent materials into the water bodies. Emission of such materials proves to be fatal due to its ill effects on the health of humans and animals.One the other hand, let us take daily life swage into consideration, sewage often contain feces and the waste from household chores. These wastes are controlled through sewage pipes which is treated in water treatment plants. However, if sewage is left unattended, it causes water contamination and gives rise to many waterborne diseases. Many developing countries who do not have access to good living conditions and water face the problem of sewage and water pollution. Even in the developed countries if the sewage is not treated well, it will create many health problems and effect the fresh water by killing the organisms livingin it.Last but not least, the farmers or the landowners that are situated near the fresh water bodies contribute to the pollutants which mix up into the water polluting it. The farmers who produce crops on large scale, need to treat and nurture their crops well to provide good quality of food to the increasing population. Taking care of these crops comes at a great price due to the usage of pesticides and fertilizers. These pesticides get washed away due to rain which eventually flows into the fresh water bodies harming the aquatic life and bringing down the quality of drinking water.What can we do to protect water? First, save water! If you save water, there is lesser contaminated water to treat, and the pressure of the same on the resources becomes minimal. Save water with simple steps like turning it off when washing vessels or brushing your teeth, not using the washing machine when the load is not high, using a mop or cloth to wash the yard instead of a hose pipe and the like.Secondly, watch what you are throwing! Keep a lookout for what you're discarding. Never, ever throw oil, paints, litter and things like that into the sink or the toilet. Somewhere down the line, it mixes with the water sources and adds to the contamination. This also includes not salting the driveways in the winter to get rid of the snow. The salt finds its way into the nearest water body, killing off fish in its wake. Also, takeyour car for regular servicing. The oil leaks and chemicals that it is giving off is going into the nearest water body and causing pollution again.Then, go easy on the chemicals! All those pesticides and fertilizers that you're using in your garden? They are really harmful and poisonous when mixed with water. Basically, not fit for human consumption. How's that connected? These pesticides and chemicals find a way into the water resources and pollute the water further. One way in which you can prevent this factor is to have a lot of plants in your garden. These act as buffers and prevent the chemicals from escaping into water bodies.In addition,reducing pollution in the air could reduce water pollution. Changes to agricultural practices could provide a solution. Improvements to sewage treatment systems would reduce pollution.My dear friends,Water is the source of life, but it is not inexhaustible. If we did not take action now, the last drop of water in the world would be man’s tear!Let's act together, cherish water, save water and protect water! That’s all, thank you!。
Water_Pollution水污染英文PPT幻灯片课件
For government
1To establish the urban sewage treatment system (城市污水处理系统的建立 )
2 To restructur the Industrial（调整产业结构）
3.To develop the new water sources
There are many influence that we can’t describe them by words. So I will
show you some pictures.
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Discharging sewage into water
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Water hyacinth
水葫芦
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4.To strengthen the planning and management of water resources
5.To control the agricultural non-point source pollution （控制农业面源污染）
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For Business
1. To reduce water consumption(减少耗水 量)
2. To buy equipment of sewage treatment (买污水处理设备)
3. Don‘t discharge sewage into water. (不要乱排污水)
4. To estiblish the water recycling system
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For individual
• Damage Harm to human 's health
• Destruction of Marine fishery resources and aquatic products
水污染--英语课上演讲ppt文稿
The last drop of human, will be tears of remorse after environmental damage
PART1
1.what is the problem we are facing now?
2.Is this water in your hometown clean?
pollution which has long ignored by us.It is high time we
take actions.
知识回顾 Knowledge Review
祝您成功！
problem,water resources are so scarce, water pollution is also very serious.I want to say: when the water of life, the source of life is all dirty water, what can we drink?
In my mind, the water environment of my hometown is not as good as before, may be your hometown also faces the
same situation.
Groundwater accounts for water resources in China118citiesFra bibliotekclean
Light pollution Serious pollution
The proportion of national drinking Groundwater
水污染-英文版课件PPT精选全文完整版
Other food-processing plants discharge fruit and vegetable skins, seeds, leaves, stems, and other vegetable wastes.
Oil spills from tankers at sea or leaks from underground storage tanks on land are very difficult to control
Oil spills at sea decrease the oxygen level in the water and cause grave harm to the creatures living in the sea.
2021/3/10
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As water moves along or beneath the surface of the Earth, it dissolves minerals and matter from decaying plants and animals.
The principal positive ions (cations) in natural water are sodium (Na+), potassium (K+), calcium (Ca2+), magnesium (Mg2+), and sometimes iron (Fe2+ or Fe3+).
Domestic sewage contains a wide variety of dissolved and suspended impurities: a. organic materials-food and vegetable waste b. plant nutrients- chemical soaps, washing powders c. disease-causing microbes微生物
学习资料英语演讲稿-水污染-英文PPT.ppt
2
1
Some data 2 water use& pollution
3 what can we do
3
71% of earth’s surface is covered with water
Are the water sources abundant?
11000 8800
5000 2200 1047 3347 0 China North South World USA Russia china China
• with water resources per capita being2200m3 or so, only 1/4 of that of the world.
Agricultural runoff from large, open expanses is major source of water pollution.
精心整理
Industrial Water Use
Accounts for nearly 50% of all water withdrawal in U.S., and 23% worldwide.
90% of water used by industry is for cooling, and is returned to the source. Very little actually consumed. Most processes involve heat exchange.
Water used to dissipate and transport waste. Toxic and overload wastes lead Stream and lake degradation.
水污染-英文演讲ppt
Thank you !
WATER POLLUTION
Yangzhou, China Miles
The four basic natural resources are water, air, land and energy. We need water for multiple uses and a certain quality is required. Its use leads to the generation of wastewater that can cause an impact on the environment.
As far as future prospect is concerned, I am sure that good results will be achieved in this respect. Rivers which used to be contaminated by industrial wastes will be cleaned and fish which could not live there a few years ago will be again. To conclude, it seems obvious that tomorrow will be better and brighter only if everyone does his part and tries hard to seek solutions for its control.
In addition, factories in towns and cities must be prohibited from draining waste liquids into rivers before they are totally treated and purified. I feel if they violate relevant rules or laws, they should be fined heavily. Certainly, there are some other cures which are worth adopting.
water pollution 水污染ppt
Effects of Thermal Water Pollution
Effects of Heavy Metal Water Pollution
Some other effects of water pollution
Machinery in the industries are cooled with water from lakes and rivers. This water reaches the river in a heated state. This water decreases the ability of the aquatic system to hold oxygen and raises the growth of warm water species.
Municipal causes
Industrial causes
Agricultural causes
The effects of water pollution are seen in Thermal, Heavy
Metal, Agricultural regions
Effects of Agricultural Water Pollution
In rivers, oceans and seas, water pollution effects flora and fauna in them. Further, the birds and animals that consume this contaminated food supply can perish. Blood diseases, nervous system disorders and heart diseases are some of the effects of water pollution.
水污染英文演讲ppt
As you know, people depend on water to live on. They should be involved in finding a solution to this problem. I think, certain counter measures need to be taken as soon as possible. To begin with, the governments of all countries are supposed to formulate rules and regulations to deal with the pollution problem.
In addition, factories in towns and cities must be prohibited from draining waste liquids into rivers before they are totally treated and purified. I feel if they violate relevant rules or laws, they should be fined heavily. Certainly, there are some other cures which are worth adopting.
The four basic natural resources are water, air, land and energy. We need water for multiple uses and a certain quality is required. Its use leads to the generation of wastewater that can cause an impact on the environment.
英语演讲稿-水污染_英文PPT
19%
南方 北方
人口: 53% population GDP: 56%53% 水资源:78% waterresource:78%
水资源
土地资源
Water is considered polluted if a substance or condition is present that renders the water useless for a particular purpose
1
Some data
water use& pollution what can we do
2
3
71% of earth’s surface is covered with water
Are the water sources abundant?
Low layer
0.3% of fresh water less than 3% Of total water
Water Issues in China
water resources per capita
• China water resource rank fourth in the world. • China isn't rich in water resources .
30000 (m3/yr/ca) 25000 20000 15000 10000 5000 0 China North china South China World USA Russia 2200 1047 3347 8800 11000 26600
World Water Day
(World Day for Water) • On March 22
• the United Nations General Assembly（联合 国大会） in 1993 • aim: to arouse public’s awareness of economizing water sources, and to protect it
水污染 英文演讲ppt
Drought Pollution
Approximately 300 million nationwide have no access to clean water. Furthermore, over 700 million Chinese drink fetid water below World Health Organization standards. Almost 90% of underground water in cities are affected by pollution and 80% of China’s rivers fail to meet standards for fishing. Almost all of the nation's rivers are considered polluted to some degree, and half of the population lacks access to clean drinking water. Ninety percent of urban water bodies are severely polluted.
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All about Water pollution
1.Cause 2.influence
3.solution
3
Cause
Nowadays, water pollution is deteriorating. Rivers, lakes and even oceans all over the world are becoming polluted by garbage and dangerous chemicals. Oil and other Chemicals can kill fish and make water unsafe for drinking.
• Damage Harm to human 's health
• Destruction of Marine fishery resources and aquatic products
• Harm to human health
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The garbage in water
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Back
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Water Pollution
Water Pollution
Made by: The Sun
1
Water Pollution
introduction
Water pollution is the contamination of water bodies (e.g. lakes, rivers, oceans, aquifers and groundwater).
water.
BACK
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ห้องสมุดไป่ตู้
Water Pollution
distribution
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Influence
Water pollution is one of the most serious problems that mankind faces today. 1.For business or industry, it affects products’ quality , increased corrosion of products, and so on. 2.For individual, it does damage to the human’s healthy.
Red tide
• reasons of form red tide
• Water eutrophication • Meteorological and
hydrological and physical and chemical properties of the sea
• Damages of red tide
There are many influence that we can’t describe them by words. So I will
show you some pictures.
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9
Discharging sewage into water
10
Water hyacinth
水葫芦
11
Stop Pollution
Environmental
Protection
What can
We Do ?
Water Conservation
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Solution
Everyone wants to reduce pollution. But the pollution problem is as complicated as it is serious.
Before we think about what should we do to solve this problem ,we should first know
what cause the problem.
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1.Natural pollution
Due to the dissolution of geological, atmospheric precipitation leaching, erosion on the ground, mix the various pollutants into the water 因地质的溶解作用，降水对大气的淋 洗、对地面的冲刷，挟带各种污染物 流入水体而形 成
What should we do to solve this problem Gradually?
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For government
1To establish the urban sewage treatment system (城市污水处理系统的建立 )
2 To restructur the Industrial（调整产业结构）
Water pollution occurs when pollutants are discharged directly or indirectly into water bodies without adequate treatment to remove harmful compounds.
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2. Man-made pollution
1. industrial wastewater (工业废水) 2. Daily life sewage (生活污水) 3. Pesticide and fertilizer pollution
（农业化肥污染）
These do damage to the quality of