英语演讲稿水污染英文.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
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.
水污染英文版课件
03
Standard for heavy metals
The concentration of heavy metals such as lead, cadmium, mercury, etc. should be very low to avoid toxic effects on human health and the environment
Non Point Source Pollution
Non point source pollution refers to the diffuse discharge of pollutants into a water body from a variety of sources, such as fields, roads, and stormwater runoff
Causes of Water Pollution
Industrial waste
Chemical reserves, heavy metals, and organic compounds are often discharged into water bodies during industrial production processes
Setting up treatment facilities
Establishing advanced treatment facilities such as sewage treatment plants, garbage treatment facilities, etc. to ensure that the water quality meets the standards before it is released into the environment
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.
水污染英文版课件
Water Quality Standards
01
Standard for fecal coliform
03
Standard for heavy metals
The concentration of heavy metals such as lead, cadmium, mercury, etc. should be very low to avoid toxic effects on human health and the environment
Municipal Waste Water Pollutio
01
Municipal waste water pollution is caused by the discharge of sewage and stormwater runoff from residential, commercial, and institutional sources
Sewage discharge
Municipal and industrial wastewater directly discharged into water bodies can cause pollution
Effects of Water Pollution on
Human health
02
Types of Water Pollution
Point Source Pollution源自010203
海洋污染 英文演讲稿ppt课件
5
6
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The five wastewater discharged into the ocean
• First, the low-level radioactive waste water
The second, containing the easily degradable organic compounds and
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1ars, the Chinese people's awareness of resource protection is weak and the legal concept is thin. We often destruct at first and protect when situation is terrible, so many land aquatic organisms and marine life have disappeared from our sight. As a result of Kinds of reasons, the Chinese marine biodiversity and the marine environment isstill is worrying.
marine polution in China team members
1
1.
The lose of living environment
enclosing tideland, Marine、 coastal project and waterway dredging activities are the causes. thus, the normal activity of Marine life is Seriously interfered, sometimes even make Marine biological habitat completely extincted. And the decline in the number of mangrove is the best example.
海洋污染 英文演讲稿 ppt课件
The five wastewater discharged into the ocean
• First, the low-level radioactive waste water
The second, containing the easily degradable organic compounds and
2.
overfishing and illeagally trade
because a lot of Marine animal has very high ornamental value or can be treated as art collection, and with nutritional value,people are driven by intereststo fish and even illegally catch.What's more,Marine fishing vessels increased dramatically, fishing segment has improved steadily . these cause serious destruction of the resources and even make them die out.
4.
Marine environment pollution
Ocean oil leak, Marine transportation ,various landsourced pollutants (mainly coastal industrial wastewater and life sewage) discharged into the sea , aggravating the Marine environment pollution, and the Marine ecological environment has deteriorated.
水污染英文 ppt课件
Household Chemicals
Example: substances used for houses clean: Soap and synthetic detergents Wax Paints and paint removers Bleaches Disinfectants消毒剂 Polishes
批注本地保存成功开通会员云端永久保存去开通
Water pollution
Water is Essential for Life
It covers 71% of the earth's surface and makes up 65 % of our bodies.
Without the seemingly invaluable compound comprised of hydrogen and oxygen, life on Earth would be nonexistent
Refineries 精炼厂 release dyes, oils, acids 盐水, sulfur compounds, and other wastes.
Chemicals plants produce a variety of waste materials.
Oil spills
Oil spills from tankers at sea or leaks from underground storage tanks on land are very difficult to control
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Water used to dissipate and transport waste. Toxic and overload wastes lead Stream and lake degradation.
Agricultural runoff from large, open expanses is major source of water pollution.
Industrial Water Use
Accounts for nearly 50% of all water withdrawal in U.S., and 23% worldwide.
Uneven distribution o水f 资w源at分e布r r不e均sources
% 100 80 81%
60
40
38%
20
0
南方
水资源
62%
19%
北方
土地资源
• No北rth方: pwoa人 G水ptDue口 资 Plra:rt源 :4ei4os:4%no7:u2%4r27c%% e:22% Sou南th方: 人口: 53% popGuDPla:tio5n6%53% wa水ter资re源so:u7r8c%e:78%
• China isn't rich in water resources .
• Obviously, the prospect of Chinese water resources isn't optimistic.
30000 (m3/yr/ca) 25000
26600
20000
15000 10000
Sub-irrigation
Pipes can be used for drainage as well
Agricultural Water Pollution
Excessive fertilizer use may lead to eutrophication（水体富营养化） in many aquatic habitats.
Water is considered polluted if a substance or condition is present that renders the water useless for a particular purpose
The sources of water pollution11000 Nhomakorabea8800
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.
• It’s takes a lot of water to keep life going.
1
Some data 2 water use& pollution 3 what can we do
71% of earth’s surface is covered with water
Are the water sources abundant?
environment
Water is the source of all things
• It’s the only water, but it’s the liquid wonder that makes our world possible.
• Water is able to dissolve more substances than any other liquid.
Industrial Water Pollution
All kinds of industry generate trade waste (工业废水）
Iron and steel industry Food industry Complex organic chemicals industry Nuclear industry Pollutants: organics, oil, metal, acid May require special wastewater treatment.
Direct sources
effluent outfalls from factories, refineries( 精 炼厂）, waste treatment plants ...
Indirect sources
contaminants that enter the water supply from soils/groundwater systems and from the atmosphere via rain water...
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.
Agricultural Water Use
Four common irrigation methods:
Surface / Flood
Requires extensive canal systems
Spray
Use pumps
Trickle
Strategically places openings
Domestic Water Use
70% used as solvent to carry wastes. 30% used for lawn and garden. Very small fraction used for drinking.