Water pollution is a global threat that leads to deaths and diseases worldwide
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Water pollution is a global threat that leads to deaths and diseases worldwide
Admin Sun Aug 09, 2009 11:00 am
Discuss about the causes of water pollution and how does it affects the biodiversity.
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mrs kumar
Admin Sun Aug 09, 2009 1:09 pm
is water pollution narrowed to the oceans or any source / forms of water source? 
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N.Ziwei(34)
unitysec09_18 Sun Aug 09, 2009 5:54 pm
I think that pollution is a very serious case, as it endangered the life of the marine animals, and sooner and later, the population will kept on decrease and eventually they will become endangered or extinct. The human activities already affect the air, and land, and now many activities like oil spilling harm the marine life, and they have no ways to solve the problems, and they can only wait for their death. It is a very sad situation to see when we human do things that benefits ourselves, but then harm other living organism and endanger them. Water pollution can cause disease that can eventually spread to human beings, and we human will get harm to. So i think that water pollution is a global threat that leads to deaths and diseases worldwide.
unitysec09_18- Posts : 17
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Wen Jie (26)
unitysec09_17 Mon Aug 10, 2009 12:16 pm
I personally thinks that water pollution is can endangers the life of marine animals. This may eventually cause the extinction of them. The many of our activities already affect the air and land, and now we pollute the waters by having factories by the water bodies. The factories may just dispose their chemical waste, after that the governments might need to speed a large sum of money to clear up the mess.
Why are we humans polluting the environment we live in? Why we human only care about things that benefits ourselves?
When we pollute the waters, the marine animals gets sick. What will happen if we eat the fishes that are already sick? We will be sick ourselves right? So why are we harming the environment and the rest of the human community?
Why are we humans polluting the environment we live in? Why we human only care about things that benefits ourselves?
When we pollute the waters, the marine animals gets sick. What will happen if we eat the fishes that are already sick? We will be sick ourselves right? So why are we harming the environment and the rest of the human community?
unitysec09_17- Posts : 103
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Re: Water pollution is a global threat that leads to deaths and diseases worldwide
Ivan(29) Mon Aug 10, 2009 1:03 pm
I personally think that many causes of water pollution including sewage and fertilizers contain nutrients such as nitrates and phosphates. In excess levels, nutrients may over stimulate the growth of aquatic plants and algae. Excessive growth of these types of living things will eventually clogs our waterways, use up dissolved oxygen as they decompose, and block light to deeper waters so that plants there can photosynthesis.
This, in turn, proves very harmful to aquatic organisms as it affects the respiration ability or fish and other invertebrates that reside in water.
Pollution is also caused when silt and other suspended solids, such as soil, washoff plowed fields, construction and logging sites, urban areas, and eroded river banks when it rains.When these sediments enter various bodies of water, fish respirationbecomes impaired, plant productivity and water depth become reduced, and aquatic organisms and their environments become suffocated.Pollution in the form of organic
material enters waterways in many different forms as sewage, as leaves and grass clippings, or as runoff from livestock feedlots and pastures. When natural bacteria and protozoan in the water break down this organic material, they begin to use up the oxygen dissolved in the water. Many types of fish and bottom-dwelling animals cannot survive when levels of dissolved oxygen drop below two to five parts per million. When this occurs, it kills aquatic organisms in large numbers which leads to disruptions in the food chain.
This, in turn, proves very harmful to aquatic organisms as it affects the respiration ability or fish and other invertebrates that reside in water.
Pollution is also caused when silt and other suspended solids, such as soil, washoff plowed fields, construction and logging sites, urban areas, and eroded river banks when it rains.When these sediments enter various bodies of water, fish respirationbecomes impaired, plant productivity and water depth become reduced, and aquatic organisms and their environments become suffocated.Pollution in the form of organic
material enters waterways in many different forms as sewage, as leaves and grass clippings, or as runoff from livestock feedlots and pastures. When natural bacteria and protozoan in the water break down this organic material, they begin to use up the oxygen dissolved in the water. Many types of fish and bottom-dwelling animals cannot survive when levels of dissolved oxygen drop below two to five parts per million. When this occurs, it kills aquatic organisms in large numbers which leads to disruptions in the food chain.
Ivan(29)- Guest
Re: Water pollution is a global threat that leads to deaths and diseases worldwide
Ivan(29) Mon Aug 10, 2009 1:10 pm
Water, air and soil pollution, along with other environmental factors, contribute to 40 percent of deaths worldwide each year.
With an estimated 1.1 billion people in the world lacking access to clean water, it is little wonder that waterborne infections account for 80 percent of all infectious diseases in the world.
Most of the problems from contaminated water are an issue in developing countries, where there is little infrastructure to deal with sewage and other water sanitation issues.People in developing countries dump 95 percent of their untreated urban sewage into the same lakes and rivers they use for drinking and bathing.
With an estimated 1.1 billion people in the world lacking access to clean water, it is little wonder that waterborne infections account for 80 percent of all infectious diseases in the world.
Most of the problems from contaminated water are an issue in developing countries, where there is little infrastructure to deal with sewage and other water sanitation issues.People in developing countries dump 95 percent of their untreated urban sewage into the same lakes and rivers they use for drinking and bathing.
Ivan(29)- Guest
Ivan Lee(29)
unitysec09_17 Mon Aug 10, 2009 1:14 pm
Many causes of pollution including sewage and fertilizers contain nutrients such as nitrates and phosphates. In excess levels, nutrients over stimulate the growth of aquatic plants and algae. Excessive growth of these types of organisms consequently clogs our waterways, use up dissolved oxygen as they decompose, and block light to deeper waters to enable photosynthesys in plants.
This, in turn, proves very harmful to aquatic organisms as it affects the respiration ability or fish and other invertebrates that reside in water.
Pollution is also caused when silt and other suspended solids, such as soil, washoff plowed fields, construction and logging sites, urban areas, and eroded river banks when it rains.When these sediments enter various bodies of water, fish respirationbecomes impaired, plant productivity and water depth become reduced, and aquatic organisms and their environments become suffocated. Pollution in the form of organic
material enters waterways in many different forms as sewage, as leaves and grass clippings, or as runoff from livestock feedlots and pastures. When natural bacteria and protozoan in the water break down this organic material, they begin to use up the oxygen dissolved in the water. Many types of fish and bottom-dwelling animals cannot survive when levels of dissolved oxygen drop below two to five parts per million. When this occurs, it kills aquatic organisms in large numbers which leads to disruptions in the food chain.
p.s i forgot to sign in before typing it out so this is a repeat but i am modifying it.
This, in turn, proves very harmful to aquatic organisms as it affects the respiration ability or fish and other invertebrates that reside in water.
Pollution is also caused when silt and other suspended solids, such as soil, washoff plowed fields, construction and logging sites, urban areas, and eroded river banks when it rains.When these sediments enter various bodies of water, fish respirationbecomes impaired, plant productivity and water depth become reduced, and aquatic organisms and their environments become suffocated. Pollution in the form of organic
material enters waterways in many different forms as sewage, as leaves and grass clippings, or as runoff from livestock feedlots and pastures. When natural bacteria and protozoan in the water break down this organic material, they begin to use up the oxygen dissolved in the water. Many types of fish and bottom-dwelling animals cannot survive when levels of dissolved oxygen drop below two to five parts per million. When this occurs, it kills aquatic organisms in large numbers which leads to disruptions in the food chain.
p.s i forgot to sign in before typing it out so this is a repeat but i am modifying it.
unitysec09_17- Posts : 103
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Ivan Lee(29)
unitysec09_17 Mon Aug 10, 2009 1:15 pm
Water, air and soil pollution, along with other environmental factors, contribute to 40 percent of deaths worldwide each year.
With an estimated 1.1 billion people in the world lacking access to clean water, it is little wonder that waterborne infections account for 80 percent of all infectious diseases in the world.
Most of the problems from contaminated water are an issue in developing countries, where there is little infrastructure to deal with sewage and other water sanitation issues.People in developing countries dump 95 percent of their untreated urban sewage into the same lakes and rivers they use for drinking and bathing.
p.s i forgot to sign in before typing it out so this is a repeat but i am modifying it.
With an estimated 1.1 billion people in the world lacking access to clean water, it is little wonder that waterborne infections account for 80 percent of all infectious diseases in the world.
Most of the problems from contaminated water are an issue in developing countries, where there is little infrastructure to deal with sewage and other water sanitation issues.People in developing countries dump 95 percent of their untreated urban sewage into the same lakes and rivers they use for drinking and bathing.
p.s i forgot to sign in before typing it out so this is a repeat but i am modifying it.
unitysec09_17- Posts : 103
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bryan wong (22)
unitysec09_18 Mon Aug 10, 2009 2:17 pm
there are many causes of water pollution like sinking ship which leaks petrol or oil , dumping of poisonous or radioactive chemicals in the ocean and littering. A pollutant wich many of us do not know is grenade fishing which invovles throwing a bomb or grenade into the water to kill fishes which floats up and fishermen take their time to pick up the fishes. More often than not , they oftan killl more fishes than they need leaving bodies littered in the sea which can lead to a unbalanced ecosystem like what the poisonous chemicals can do.
unitysec09_18- Posts : 17
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Clara Toh. (2)
unitysec09_17 Mon Aug 10, 2009 2:20 pm
Causes are mainly due to :- wastes being disposed into the sea.
- industrial
facilities using freshwater to carry away waste from the plant and into
rivers, lakes and oceans.
- daily basis from oil spills, routine shipping,
run-offs and dumping.
- global warming
- eutrophication
These causes affect the biodiversity as it poses as a threat to the marine animals and plants.
It may cause some animals to fall sick and then , we humans will be eating the animals.
If the diseases spreads, many people may fall sick , or even die.
Humans are only thinking that they can save money and time by disposing wastes into the water, and not thinking whether it affects the environment, and if it will affect biodiversity.
They are very selfish, and only think about the benefits which they get and instead of stopping water pollution, they are making it worse by dumping more waste into the water, which in turn, harms the environment which we live in and endanger peoples' life.
- industrial
facilities using freshwater to carry away waste from the plant and into
rivers, lakes and oceans.
- daily basis from oil spills, routine shipping,
run-offs and dumping.
- global warming
- eutrophication
These causes affect the biodiversity as it poses as a threat to the marine animals and plants.
It may cause some animals to fall sick and then , we humans will be eating the animals.
If the diseases spreads, many people may fall sick , or even die.
Humans are only thinking that they can save money and time by disposing wastes into the water, and not thinking whether it affects the environment, and if it will affect biodiversity.
They are very selfish, and only think about the benefits which they get and instead of stopping water pollution, they are making it worse by dumping more waste into the water, which in turn, harms the environment which we live in and endanger peoples' life.
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Maru (7) - 1/7
unitysec09_17 Mon Aug 10, 2009 4:32 pm
Another type of pollution- water pollution is mainly caused by human. Chemicals from factories or waste products from houses are usually the cause. But, not only human activities cause damage to the water. Natural phenomena such as volcano eruptions and earthquakes also pollute the water. It is a very serious case. Pollution don't only cause marine animals to die, but also it will not support our human needs like serving as drinking water. Throwing garbage on water makes animals to eat it, and if it's poisonous, they will die.
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Maru (7) - 1/7
unitysec09_17 Mon Aug 10, 2009 4:40 pm
I personally thinks that water pollution is can endangers the life of marine animals. This may eventually cause the extinction of them. The many of our activities already affect the air and land, and now we pollute the waters by having factories by the water bodies. The factories may just dispose their chemical waste, after that the governments might need to speed a large sum of money to clear up the mess.
Why are we humans polluting the environment we live in? Why we human only care about things that benefits ourselves?
When we pollute the waters, the marine animals gets sick. What will happen if we eat the fishes that are already sick? We will be sick ourselves right? So why are we harming the environment and the rest of the human community?
I agree to this statement. Water pollution really endangers the lives of marine animals. Extinction of them may happen soon if people of factories do not stop throwing chemical wastes into the water. I also agree that by polluting the surroundings, we harm ourselves. We will become sick because of the polluted surroundings. We are putting our own community's health at risk.
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yuen sian(14) -17
unitysec09_17 Mon Aug 10, 2009 5:03 pm
Water pollution is a global threat that leads to deaths and diseases worldwide
i agree to the statement as all living things need to drink water and without water all living things cannot survive. drinking polluted water may cause the human to have diseases regardless if it's fatal or not.and water is usually transported to all parts of the world.so water pollution that contains diseases can spread to worldwide and cause a disaster.
i agree to the statement as all living things need to drink water and without water all living things cannot survive. drinking polluted water may cause the human to have diseases regardless if it's fatal or not.and water is usually transported to all parts of the world.so water pollution that contains diseases can spread to worldwide and cause a disaster.
Last edited by unitysec09_17 on Sat Aug 15, 2009 3:54 pm; edited 1 time in total
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nicholas(37)-17
unitysec09_17 Mon Aug 10, 2009 5:12 pm
i agree because disease spreading to worldwide is a serious problem as all living things cannot survive without water for long.i think that we should save the earth's water resources starting from now before it's too late and we should not pollute the water.that is the least we could do.examples are that we should not litter the beach when we have picnic there and we should not anyhow throw things into the sea
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vanessa (15)
unitysec09_18 Mon Aug 10, 2009 7:10 pm
Water pollution has always been a threat to the marine animal . When there is an oil spill , the marine animal suffers . They will not be able to live in such circumstances. Even if the animals did not die , the fisherman who caught the fish will sell it off to the people . And if we eat those affected fishes , there will also a negative impact on us sooner or later.there may be a disease caused by eating the animals
And if it continues or the oil spill is serious , it will kill the marine animal and soon led to extinction of a particular animal .
in order to save the marine life and indirrectly our lifes , we should stop all kinds of pollution to harm the Earth.
And if it continues or the oil spill is serious , it will kill the marine animal and soon led to extinction of a particular animal .
in order to save the marine life and indirrectly our lifes , we should stop all kinds of pollution to harm the Earth.
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jinuu(23)-1/7
unitysec09_17 Mon Aug 10, 2009 7:51 pm
Water pollution is a worldwide threat to marine lives and to humans. From water pollution, it will harm fishes. Humans will kill the fishes if some of the fishes escaped and got caught and is sold to humans, they will become sick and maybe even die. In order to save these marine animals and ourselves, we should stop water pollution NOW!!!
Last edited by unitysec09_17 on Mon Aug 10, 2009 7:59 pm; edited 1 time in total
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jin-uu(23)- 1/7
unitysec09_17 Mon Aug 10, 2009 7:59 pm
I agree with Nicholas as water pollution causes diseases which are spreading all over the world. Human beings cannot survive without water. We should start conserving Earth's water now or in years to come , we will be extinct.
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Qinyi (1) 1/7
unitysec09_17 Mon Aug 10, 2009 11:37 pm
I agree. Water pollution is now a serious problem in the Earth. Water pollution is a total threat to marine life and even we humans, that will eventually cause extinction. Due to human's laziness, we just tend to throw waste into the drains, pond or even seaside, thinking that its only a small problem, but it will eventually become big problem leading to water pollution. Filtering the water that is polluted cost a lot of money to let it be clean again, take the Singapore River as an example: It took so many years and so much money just for a small river to be clean, what more the sea. The sea is takes up 2/3 the percentage of the Earth, but the it is all mainly polluted. Water pollution also causes diseases, if the water we drink is not filtered clean enough, we might ended up sick.
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jia xin 08
unitysec09_18 Tue Aug 11, 2009 6:03 pm
Water pollution is the contamination of water bodies such as lakes, rivers, oceans, and groundwater. All water pollution affects organisms and plants that live in these water bodies and in almost all cases the effect is damaging either to individual species and populations but also to the natural biological communities. It occurs when pollutants are discharged directly or indirectly into water bodies without adequate treatment to remove harmful constituents. In the same time, water pollution also kills marine life and this might bring these innocent marine creatures and might lead to the worse case as extinction.
So, I would like to tell all of you that to reduce the number of water pollution, we can stop throwing rubbish into the sea and not litter the sea and this will also reduce the chance of extinction of the innocent marine life.
So, I would like to tell all of you that to reduce the number of water pollution, we can stop throwing rubbish into the sea and not litter the sea and this will also reduce the chance of extinction of the innocent marine life.
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Chernislow (o6)
unitysec09_17 Tue Aug 11, 2009 8:15 pm
Water pollution has always been a threat and leads to death and diseases worldwide. It also causes harm to marine creatures and you will never know when they die and will be extinct.
Water pollution can be caused by oil leaks by ships, by inconsiderate people throwing rubbish into the sea, or even by dumping radioactive substances. There is even nutrient pollution. As you can tell all the other reasons stated above are the typical reasons but in my opinion, I find that nutrient pollution is an interesting one. Let me start by explaining what nutrient pollution is all about.
Nutrient pollution is most widespread, chronic environmental problem in the coastal ocean. The discharges of nitrogen, phosphorus, and other nutrients come from agriculture, waste disposal, coastal development, and fossil fuel use. Once nutrient pollution reaches the coastal zone, it stimulates harmful overgrowths of algae, which can have direct toxic effects and ultimately result in low-oxygen conditions.
Water pollution can be lethal. They can kill the fish and plant life. This in turn can kill the birds and other animals that eat this contaminated food supply. Water pollution can even cause deaths to humans. Almost every type of contamination found in water has a detrimental effect on humans. Blood diseases, heart disease and nervous system disorders are commonly linked to the effects of water pollution. In serious cases, cancer can even be caused. Less severe effects of water pollution can include diarrhea, skin lesions, and vomiting.
Water pollution can be caused by oil leaks by ships, by inconsiderate people throwing rubbish into the sea, or even by dumping radioactive substances. There is even nutrient pollution. As you can tell all the other reasons stated above are the typical reasons but in my opinion, I find that nutrient pollution is an interesting one. Let me start by explaining what nutrient pollution is all about.
Nutrient pollution is most widespread, chronic environmental problem in the coastal ocean. The discharges of nitrogen, phosphorus, and other nutrients come from agriculture, waste disposal, coastal development, and fossil fuel use. Once nutrient pollution reaches the coastal zone, it stimulates harmful overgrowths of algae, which can have direct toxic effects and ultimately result in low-oxygen conditions.
Water pollution can be lethal. They can kill the fish and plant life. This in turn can kill the birds and other animals that eat this contaminated food supply. Water pollution can even cause deaths to humans. Almost every type of contamination found in water has a detrimental effect on humans. Blood diseases, heart disease and nervous system disorders are commonly linked to the effects of water pollution. In serious cases, cancer can even be caused. Less severe effects of water pollution can include diarrhea, skin lesions, and vomiting.
Last edited by unitysec09_17 on Tue Aug 11, 2009 8:15 pm; edited 2 times in total
unitysec09_17- Posts : 103
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Chernislow (o6)
unitysec09_17 Tue Aug 11, 2009 8:27 pm
unitysec09_17 wrote:I agree. Water pollution is now a serious problem in the Earth. Water pollution is a total threat to marine life and even we humans, that will eventually cause extinction. Due to human's laziness, we just tend to throw waste into the drains, pond or even seaside, thinking that its only a small problem, but it will eventually become big problem leading to water pollution. Filtering the water that is polluted cost a lot of money to let it be clean again, take the Singapore River as an example: It took so many years and so much money just for a small river to be clean, what more the sea. The sea is takes up 2/3 the percentage of the Earth, but the it is all mainly polluted. Water pollution also causes diseases, if the water we drink is not filtered clean enough, we might ended up sick.
I agree with this. Water pollution does cause extinction of the marine creatures. If we do not take the problem in hand, soon enough, our whole earth will be gone. And also, from a minor problem, it shall become a big one if we do not stop water pollution now. Cleaning rivers or seas not only need money, but they need a lot of effort too. Water is very important to us, it does not only hydrate our body, it also provides a home for marine creatures.
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Nicolette(8)
unitysec09_17 Tue Aug 11, 2009 10:04 pm
Water pollution are cause by pesticides applied to farm fields and roadsides.The pesticides then run off into local streams and rivers or drain down into groundwater, contaminating the fresh water that fish swim in and the water we humans drink.
Its not mostly a farming problem, homeowners apply even more chemicals to their lawns then farmers do to their fields, but still, farming is a big contributor to this problem.
In the midwestern United States, a region that is highly dependent on groundwater, water utilities spend $400 million each year to treat water for just one chemical—the pesticide Atrazine.
Air pollution also contributes substantially to water pollution.Pollutants like mercury, sulfur dioxide, nitric oxides, and ammonia deposit out of the air and then cause problems like mercury contamination in fish, acidification of lakes, and eutrophication (nutrient pollution).
Water pollution effects animals like amphibians as they tend to be very pollution sensitive due to the fact that they absorb chemicals in the water through their skins; this is one reason why many amphibian populations are in distress today.
Oil spills effects marine life as oil cannot be dissolve in water and forms a thick sludge in the water. This suffocates fish, gets caught in the feathers of marine birds stopping them from flying and blocks light from photosynthetic aquatic plants.
http://www.water-pollution.org.uk/oilpollution.html
http://www.grinningplanet.com/2005/09-06/water-pollution-causes-article.htm
Its not mostly a farming problem, homeowners apply even more chemicals to their lawns then farmers do to their fields, but still, farming is a big contributor to this problem.
In the midwestern United States, a region that is highly dependent on groundwater, water utilities spend $400 million each year to treat water for just one chemical—the pesticide Atrazine.
Air pollution also contributes substantially to water pollution.Pollutants like mercury, sulfur dioxide, nitric oxides, and ammonia deposit out of the air and then cause problems like mercury contamination in fish, acidification of lakes, and eutrophication (nutrient pollution).
Water pollution effects animals like amphibians as they tend to be very pollution sensitive due to the fact that they absorb chemicals in the water through their skins; this is one reason why many amphibian populations are in distress today.
Oil spills effects marine life as oil cannot be dissolve in water and forms a thick sludge in the water. This suffocates fish, gets caught in the feathers of marine birds stopping them from flying and blocks light from photosynthetic aquatic plants.
http://www.water-pollution.org.uk/oilpollution.html
http://www.grinningplanet.com/2005/09-06/water-pollution-causes-article.htm
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Nicolette(8)
unitysec09_17 Tue Aug 11, 2009 10:27 pm
unitysec09_18 wrote:Water pollution has always been a threat to the marine animal . When there is an oil spill , the marine animal suffers . They will not be able to live in such circumstances. Even if the animals did not die , the fisherman who caught the fish will sell it off to the people . And if we eat those affected fishes , there will also a negative impact on us sooner or later.there may be a disease caused by eating the animals
And if it continues or the oil spill is serious , it will kill the marine animal and soon led to extinction of a particular animal .
in order to save the marine life and indirrectly our lifes , we should stop all kinds of pollution to harm the Earth.
I agree with Vanessa's statement. What we do now to the Earth, is indirectly hurting us in one way or another. And by the time we had the disease that is caused by eating the fish that is being affected, it might be too late, prevention is better then cure right ? Every organism on Earth need water to survive, including us. SO, save water and stop water pollution!
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Re: Water pollution is a global threat that leads to deaths and diseases worldwide
t.mf(16) Wed Aug 12, 2009 12:11 am
There is many causes of pollution which include sewage and fertilizers that contain nutrients such as nitrates and phosphates.In excess levels, nutrients over stimulate the growth of aquatic plants and algae.Excessive growth of these types of organisms consequently clogs our waterways,use up dissolved oxygen as they decompose,and block light to deeper waters.
It will be very harmful to aquatic organisms as it affects the respiration ability of fish and other invertebrates that reside in water.
Pollution is also caused when silt and other suspended solids.such as soil,washoff plowed fields,construction and logging sites,urban areas,and eroded river banks when it rains.Under natural conditions,lakes, rivers and other water bodies undergo Eutrophication which is an aging process that slowly fills in the water body with sediment and organic matter.When these sediments enter various bodies of water, fish respiration becomes impaired,plant productivity and water depth become reduced, and aquatic organisms and their environments become suffocated.Pollution in the form of organic material enters waterways in many different forms as sewage,as leaves and grass clippings,or as runoff from livestock feedlots and pastures.When natural bacteria and protozoan in the water break down this organic material,they begin to use up the oxygen dissolved in the water.Many types of fish and bottom-dwelling animals cannot survive when levels of dissolved oxygen drop.When this occurs,it kills aquatic organisms in large numbers which leads to disruptions in the food chain.
It will be very harmful to aquatic organisms as it affects the respiration ability of fish and other invertebrates that reside in water.
Pollution is also caused when silt and other suspended solids.such as soil,washoff plowed fields,construction and logging sites,urban areas,and eroded river banks when it rains.Under natural conditions,lakes, rivers and other water bodies undergo Eutrophication which is an aging process that slowly fills in the water body with sediment and organic matter.When these sediments enter various bodies of water, fish respiration becomes impaired,plant productivity and water depth become reduced, and aquatic organisms and their environments become suffocated.Pollution in the form of organic material enters waterways in many different forms as sewage,as leaves and grass clippings,or as runoff from livestock feedlots and pastures.When natural bacteria and protozoan in the water break down this organic material,they begin to use up the oxygen dissolved in the water.Many types of fish and bottom-dwelling animals cannot survive when levels of dissolved oxygen drop.When this occurs,it kills aquatic organisms in large numbers which leads to disruptions in the food chain.
t.mf(16)- Guest
mingfang(16)
unitysec09_18 Wed Aug 12, 2009 12:20 am
There is many causes of pollution which include sewage and fertilizers that contain nutrients such as nitrates and phosphates.In excess levels, nutrients over stimulate the growth of aquatic plants and algae.Excessive growth of these types of organisms consequently clogs our waterways,use up dissolved oxygen as they decompose,and block light to deeper waters.
It will be very harmful to aquatic organisms as it affects the respiration ability of fish and other invertebrates that reside in water.
Pollution is also caused when silt and other suspended solids.such as soil,washoff plowed fields,construction and logging sites,urban areas,and eroded river banks when it rains.Under natural conditions,lakes, rivers and other water bodies undergo Eutrophication which is an aging process that slowly fills in the water body with sediment and organic matter.When these sediments enter various bodies of water, fish respiration becomes impaired,plant productivity and water depth become reduced, and aquatic organisms and their environments become suffocated.Pollution in the form of organic material enters waterways in many different forms as sewage,as leaves and grass clippings,or as runoff from livestock feedlots and pastures.When natural bacteria and protozoan in the water break down this organic material,they begin to use up the oxygen dissolved in the water.Many types of fish and bottom-dwelling animals cannot survive when levels of dissolved oxygen drop.When this occurs,it kills aquatic organisms in large numbers which leads to disruptions in the food chain.
It will be very harmful to aquatic organisms as it affects the respiration ability of fish and other invertebrates that reside in water.
Pollution is also caused when silt and other suspended solids.such as soil,washoff plowed fields,construction and logging sites,urban areas,and eroded river banks when it rains.Under natural conditions,lakes, rivers and other water bodies undergo Eutrophication which is an aging process that slowly fills in the water body with sediment and organic matter.When these sediments enter various bodies of water, fish respiration becomes impaired,plant productivity and water depth become reduced, and aquatic organisms and their environments become suffocated.Pollution in the form of organic material enters waterways in many different forms as sewage,as leaves and grass clippings,or as runoff from livestock feedlots and pastures.When natural bacteria and protozoan in the water break down this organic material,they begin to use up the oxygen dissolved in the water.Many types of fish and bottom-dwelling animals cannot survive when levels of dissolved oxygen drop.When this occurs,it kills aquatic organisms in large numbers which leads to disruptions in the food chain.
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Re: Water pollution is a global threat that leads to deaths and diseases worldwide
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