Monday 13 February 2012
Pollution Effects On Humans, Animals, Plants and The Environment
Pollution Effects
On Humans, Animals, Plants and The
Environment
Pollution effects are indeed many and wide-ranging. There is no doubt that excessive
levels of pollution are causing a lot of damage to human & animal health, plants & trees including
tropical rainforests, as well as the wider environment.
Children Playing in Polluted Water
All types of pollution – air, water and soil pollution – have an impact on the living environment.
The effects in living organisms may range from mild discomfort to serious diseases such as cancer to
physical deformities; ex., extra or missing limbs in frogs.Experts admit that pollution effects are quite
often underestimated and that more research is needed to understand the connections between pollution
and its effects on all life forms.
Environmental Pollution Effects on Humans
We know that pollution causes not only physical disabilities but also psychological and
behavioral disorders in people. The following pollution effects on humans have been reported:
I. Effects of Air Pollution
• Reduced lung functioning
• Irritation of eyes, nose, mouth and throat
• Asthma attacks
• Respiratory symptoms such as coughing and wheezing
• Increased respiratory disease such as bronchitis
• Reduced energy levels
• Headaches and dizziness
• Disruption of endocrine, reproductive and immune systems
• Neurobehavioural disorders
• Cardiovascular problems
• Cancer
• Premature death
II.Effects of Water Pollution
a. Waterborne diseases caused by polluted drinking water:
• Typhoid
• Amoebiasis
• Giardiasis
• Ascariasis
• Hookworm
b. Waterborne diseases caused by polluted beach water:
• Rashes, ear ache, pink eye
• Respiratory infections
• Hepatitis, encephalitis, gastroenteritis, diarrhoea, vomiting, and stomach aches
c. Conditions related to water polluted by chemicals (such as pesticides, hydrocarbons, persistent
organic pollutants, heavy metals etc):
• Cancer, incl. prostate cancer and non-Hodgkin’s lymphoma
• Hormonal problems that can disrupt reproductive and developmental processes
• Damage to the nervous system
• Liver and kidney damage
• Damage to the DNA
• Exposure to mercury (heavy metal):
• In the womb: may cause neurological problems including slower reflexes, learning
deficits, delayed or incomplete mental development, autism and brain damage
• In adults: Parkinson’s disease, multiple sclerosis, Alzheimer’s disease, heart disease, and
even death
d. Other effects:
• Water pollution may also result from interactions between water and contaminated soil, as well
as from deposition of air contaminants (such as acid rain)
• Damage to people may be caused by fish foods coming from polluted water (a well known
example is high mercury levels in fish)
• Damage to people may be caused by vegetable crops grown / washed with polluted water
(author’s own conclusion)
III. Effects of Soil Pollution
• Causes cancers including leukaemia
• Lead in soil is especially hazardous for young children causing developmental damage to the
brain
• Mercury can increase the risk of kidney damage; cyclo dienes can lead to liver toxicity
• Causes neuro muscular blockage as well as depression of the central nervous system
• Also causes headaches, nausea, fatigue, eye irritation and skin rash
• Contact with contaminated soil may be direct (from using parks, schools etc) or indirect (by
inhaling soil contaminants which have vaporized)
• Soil pollution may also result from secondary contamination of water supplies and from
deposition of air contaminants (for example, via acid rain)
• Contamination of crops grown in polluted soil brings up problems with food security
• Since it is closely linked to water pollution, many effects of soil contamination appear to be
similar to the ones caused by water contamination.
IV. Effects of Noise Pollution
Decreases the efficiency of a man-Regarding the impact of noise on human efficiency there are
number of experiments which shows that human efficiency increases with noise reduction.
Lack of concentration-For better quality of work there should be concentration , Noise causes lack of
concentration. In big cities , mostly all the offices are on main road. The noise of traffic or the
loud speakers of different types of horns divert the attention of the people working in offices.
Fatigue:Because of Noise Pollution, people cannot concentrate on their work. Thus they have to give
their more time for completing the work and they feel tiring.
Abortion is caused-There should be cool and calm atmosphere during the pregnancy. Unpleasant
sounds make a lady of irritative nature. Sudden Noise causes abortion in females.
Causes Blood Pressure-Noise Pollution causes certain diseases in human. It attacks on the person’s
peace of mind. The noises are recognized as major contributing factors in accelerating the already
existing tensions of modern living. These tensions result in certain disease like blood pressure or
mental illness etc.
Temporary of permanent Deafness-The effect of noise on audition is well recognized. Mechanics ,
locomotive drivers, telephone operators etc. All have their hearing impairment as a result of noise
at the place of work. Physicians & psychologists are of the view that continued exposure to noise
level above. 80 to 100 db is unsafe, Loud noise causes temporary or permanent deafness.
Environmental Pollution Effects on Animals
I. Effects of Air Pollution
• Acid rain (formed in the air) destroys fish life in lakes and streams
• Excessive ultraviolet radiation coming from the sun through the ozone layer in the upper
atmosphere which is eroded by some air pollutants, may cause skin cancer in wildlife
• Ozone in the lower atmosphere may damage lung tissues of animals
II. Effects of Water Pollution
• Nutrient pollution (nitrogen, phosphates etc) causes overgrowth of toxic algae eaten by other
aquatic animals, and may cause death; nutrient pollution can also cause outbreaks of fish
diseases
Oil Coated Duck
• Chemical contamination can cause declines in frog biodiversity and tadpole mass
• Oil pollution (as part of chemical contamination) can negatively affect development of marine
organisms, increase susceptibility to disease and affect reproductive processes; can also cause
gastrointestinal irritation, liver and kidney damage, and damage to the nervous system
• Mercury in water can cause abnormal behavior, slower growth and development, reduced
reproduction, and death
• Persistent organic pollutants (POPs) may cause declines, deformities and death of fish life
• Too much sodium chloride (ordinary salt) in water may kill animals
• We also assume that some higher forms of non-aquatic animals may have similar effects from
water pollution as those experienced by humans, as described above
III. Effects of Soil Pollution
• Can alter metabolism of microorganisms and arthropods in a given soil environment; this may
destroy some layers of the primary food chain, and thus have a negative effect on predator
animal species
• Small life forms may consume harmful chemicals which may then be passed up the food chain
to larger animals; this may lead to increased mortality rates and even animal extinction.
IV. Effects of Noise Pollution
• Noise pollution damage the nervous system of animal.
• Animal looses the control of its mind.
• They become dangerous.
Environmental Pollution Effects on Trees and Plants
I. Effects of Air Pollution
Trees Damaged by Acid Rain
• Acid rain can kill trees, destroy the leaves of plants, can infiltrate soil by making it unsuitable
for purposes of nutrition and habitation
• Ozone holes in the upper atmosphere can allow excessive ultraviolet radiation from the sun to
enter the Earth causing damage to trees and plants
• Ozone in the lower atmosphere can prevent plant respiration by blocking stomata (openings in
leaves) and negatively affecting plants’ photosynthesis rates which will stunt plant growth;
ozone can also decay plant cells directly by entering stomata.
II. Effects of Water Pollution
• May disrupt photosynthesis in aquatic plants and thus affecting ecosystems that depend on these
plants
• Terrestrial and aquatic plants may absorb pollutants from water (as their main nutrient source)
and pass them up the food chain to consumer animals and humans
• Plants may be killed by too much sodium chloride (ordinary slat) in water
• Plants may be killed by mud from construction sites as well as bits of wood and leaves, clay and
other similar materials
• Plants may be killed by herbicides in water; herbicides are chemicals which are most harmful to
plants.
III. Effects of Soil Pollution
• May alter plant metabolism and reduce crop yields
• Trees and plants may absorb soil contaminants and pass them up the food chain
IV. Effects of Noise Pollution
Noise pollution causes poor quality of crops in a pleasant atmosphere.
Water pollution
(1) Water pollution is the contamination or adulteration of the water bodies, such as rivers, lakes, seas, oceans, and ground water by number of human activities. Since water is essential for all our basic needs, water pollution is a threat to us. Many communicable diseases spread through unclean water, which even results in death.
Although there are different factors that contribute to water pollution, listed below are the most dangerous causes of water pollution.
• Factories and nuclear plants play a major role in polluting the water. Wastes from factories include toxins, such as lead, mercury, and other contaminants. These chemicals are very harmful and can lead to serious health hazards.
• Nonpoint sources are one of the major causes of water pollution. Oil spills from cars, trucks, and other vehicles on land get mixed with rainwater and runoff into streams and lakes polluting them. These nonpoint sources are very difficult to monitor and control, so it falls on each individual to make sure that their vehicles used does not in any way contribute to further pollution. Proper maintenance of vehicles and oil spill cleanup using eco-friendly products, such as Oil Gone Easy S-200 will help to a great extent.
• Fertilizers and pesticides used in agricultural farms, homeowners lawns, and roadsides are a threat to the natural water source. When runoff into local streams or rivers or when drained down into groundwater, they contaminate the water completely.
• Mining is another major reason for water pollution. Heavy metals and sulfur components which are buried in the earth are exposed during mining and during rainfall these toxic chemicals are exposed, which ultimately result in "acid rain drainage"
• Surprising though it may seem, air pollution is also a cause of water pollution.
Although there are different factors that contribute to water pollution, listed below are the most dangerous causes of water pollution.
• Factories and nuclear plants play a major role in polluting the water. Wastes from factories include toxins, such as lead, mercury, and other contaminants. These chemicals are very harmful and can lead to serious health hazards.
• Nonpoint sources are one of the major causes of water pollution. Oil spills from cars, trucks, and other vehicles on land get mixed with rainwater and runoff into streams and lakes polluting them. These nonpoint sources are very difficult to monitor and control, so it falls on each individual to make sure that their vehicles used does not in any way contribute to further pollution. Proper maintenance of vehicles and oil spill cleanup using eco-friendly products, such as Oil Gone Easy S-200 will help to a great extent.
• Fertilizers and pesticides used in agricultural farms, homeowners lawns, and roadsides are a threat to the natural water source. When runoff into local streams or rivers or when drained down into groundwater, they contaminate the water completely.
• Mining is another major reason for water pollution. Heavy metals and sulfur components which are buried in the earth are exposed during mining and during rainfall these toxic chemicals are exposed, which ultimately result in "acid rain drainage"
• Surprising though it may seem, air pollution is also a cause of water pollution.
(2) One of the reasons that the water pollution problem is so severe is that it is not actually illegal to dump pollutants into water bodies.
Sewage, sludge, garbage, and even toxic pollutants are all dumped into the water. Often, governments either do not care or simply look the other way. Across the world, about half of all sewage is dumped into water bodies in its original form. No efforts are made to disinfect the sewage or to remove especially harmful pollutants.
Even if sewage is treated, problems still arise. Treated sewage forms sludge, which is sent out into the sea and dumped.
Many cities and countries dump sewage out at sea. Often, they place it not far from their own coastline, often killing all the sea wildlife in the dumping area.
In addition to sewage, chemicals dumped by industries and governments are another major source of water pollution.
Oil, such as that spilled by transport ships, has been dumped into the water since the US Civil War. Every year, between 1 and 10 billion tons of oil are spilt, killing many species and destroying the ecosystem in the area. Cleanup efforts have been weak, as only about 10% of the oil is removed by the most successful efforts.
(3) What is water pollution?
Water pollution is any chemical, physical or biological change in the quality of water that has a harmful effect on any living thing that drinks or uses or lives (in) it. When humans drink polluted water it often has serious effects on their health. Water pollution can also make water unsuited for the desired use.
There are several classes of water pollutants. The first are disease-causing agents. These are bacteria, viruses, protozoa and parasitic worms that enter sewage systems and untreated waste.
A second category of water pollutants is oxygen-demanding wastes; wastes that can be decomposed by oxygen-requiring bacteria. When large populations of decomposing bacteria are converting these wastes it can deplete oxygen levels in the water. This causes other organisms in the water, such as fish, to die.
A third class of water pollutants is water-soluble inorganic pollutants, such as acids, salts and toxic metals. Large quantities of these compounds will make water unfit to drink and will cause the death of aquatic life.
Another class of water pollutants are nutrients; they are water-soluble nitrates and phosphates that cause excessive growth of algae and other water plants, which deplete the water's oxygen supply. This kills fish and, when found in drinking water, can kill young children.
Water can also be polluted by a number of organic compounds such as oil, plastics and pesticides, which are harmful to humans and all plants and animals in the water.
A very dangerous category is suspended sediment, because it causes depletion in the water's light absorption and the particles spread dangerous compounds such as pesticides through the water.
Finally, water-soluble radioactive compounds can cause cancer, birth defects and genetic damage and are thus very dangerous water pollutants.
A third class of water pollutants is water-soluble inorganic pollutants, such as acids, salts and toxic metals. Large quantities of these compounds will make water unfit to drink and will cause the death of aquatic life.
Another class of water pollutants are nutrients; they are water-soluble nitrates and phosphates that cause excessive growth of algae and other water plants, which deplete the water's oxygen supply. This kills fish and, when found in drinking water, can kill young children.
Water can also be polluted by a number of organic compounds such as oil, plastics and pesticides, which are harmful to humans and all plants and animals in the water.
A very dangerous category is suspended sediment, because it causes depletion in the water's light absorption and the particles spread dangerous compounds such as pesticides through the water.
Finally, water-soluble radioactive compounds can cause cancer, birth defects and genetic damage and are thus very dangerous water pollutants.
Water pollution is usually caused by human activities. Different human sources add to the pollution of water. There are two sorts of sources, point and nonpoint sources. Point sources discharge pollutants at specific locations through pipelines or sewers into the surface water. Nonpoint sources are sources that cannot be traced to a single site of discharge.
Examples of point sources are: factories, sewage treatment plants, underground mines, oil wells, oil tankers and agriculture.
Examples of nonpoint sources are: acid deposition from the air, traffic, pollutants that are spread through rivers and pollutants that enter the water through groundwater.
Nonpoint pollution is hard to control because the perpetrators cannot be traced.
Examples of point sources are: factories, sewage treatment plants, underground mines, oil wells, oil tankers and agriculture.
Examples of nonpoint sources are: acid deposition from the air, traffic, pollutants that are spread through rivers and pollutants that enter the water through groundwater.
Nonpoint pollution is hard to control because the perpetrators cannot be traced.
(4)
Wednesday, November 25, 2009
Cause Of Water Pollution
1. INTRODUCTION
Water pollution is a major problem in the global context. It has been suggested that it is the leading worldwide cause of deaths and diseases, and that it accounts for the deaths of more than 14,000 people daily. An estimated 700 million Indians have no access to a proper toilet, and 1,000 Indian children die of diarrhoeal sickness every day. Some 90% of China's cities suffer from some degree of water pollution, and nearly 500 million people lack access to safe drinking water. In addition to the acute problems of water pollution in developing countries, industrialized countries continue to struggle with pollution problems as well. In the most recent national report on water quality in the United States, 45 percent of assessed stream miles, 47 percent of assessed lake acres, and 32 percent of assessed bay and estuarine square miles were classified as polluted.
Other than that, according to Department of Environment (DOE) research, dive two years about the level of pollution of rivers throughout the country, 91% of cases of river pollution is caused from man-made. This problem occurs because most people who use septic tanks refuse to cooperate with the parties involved to treat sewage waste. According to DOE of 16 categories as polluted rivers which are located mostly in the states of the rapidly developing as Penang, Johor and Selangor. Rivers in Selangor that have been identified pollution is Sungai Rephens, Sungai Tekala, Sungai Kundur, Sungai Gabai, Sungai Chenarek, Sungai Lepok and the Lowest is Sungai Congkak. Among these rivers, Sungai Rephens have a high number of koliform feces because there is a pen of cattle and sheep barn initiate by local residents.
That is related to our topic is Water Pollution. We choose this topic because some of the people not very concern about this issue and less of the cooperation. Besides that, the others purpose is increase the awareness to prevent the issue of the water pollution. Recently, water pollution become a big issue. In addition, we know that some of the glacier was become liquid. All of this are cause of global worming.
That’s why our group choose water pollution for our project topic. By the way, in recent years, water pollution issues felt very acute because many rivers and water catchment areas have experienced contamination. We feel necessary to increase awareness about the importance of being environmental pollution so that water does not Occur. We also feel that if this condition is not prevented from the beginning, future generations may not be able to view wildlife and river water is clear.
2. DEFINITION
Water is typically referred to as polluted when it is impaired by anthropogenic contaminants and either does not support a human use, like serving as drinking water, and/or undergoes a marked shift in its ability to support its constituent biotic communities, such as fish. Natural phenomena such as volcanoes, algae blooms, storms, and earthquakes also cause major changes in water quality and the ecological status of water. Water pollution has many causes and characteristics.
Water pollution to the addition of foreign substances (pollutants) to a water source. These impurities have a detrimental effect on water quality, and can be harmful to living organisms and aquatic life. Pollution can be introduced to water from both point sources and diffuse sources. Common sources of pollutants include man-made, industrial waste and domestic sewage and natural sources such as soil erosion and silt-bearing runoff.
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.
The definition also includes any solid, liquid or gaseous waste and all other substances whose cause water pollution or a violation.
3. CAUSE OF WATER POLLUTION
The water pollution in Malaysia is originated from point sources and non-point sources. Point sources that have been identified include sewage treatment plants, manufacturing and agro-based industries and animal farms. Non-point sources are mainly diffused ones such as agricultural activities and surface runoffs. According to Malaysia Environment Quality Report 2004, the Department of Environment has recorded 17,991 water pollution point sources in 2004 comprising mainly sewage treatment plants (54%), manufacturing industries (38%), animal farms (5%) and agro-based industries (3%). The distribution of the water pollution sources is shown in Figure 1 below.
Water pollution is a major problem in the global context. It has been suggested that it is the leading worldwide cause of deaths and diseases, and that it accounts for the deaths of more than 14,000 people daily. An estimated 700 million Indians have no access to a proper toilet, and 1,000 Indian children die of diarrhoeal sickness every day. Some 90% of China's cities suffer from some degree of water pollution, and nearly 500 million people lack access to safe drinking water. In addition to the acute problems of water pollution in developing countries, industrialized countries continue to struggle with pollution problems as well. In the most recent national report on water quality in the United States, 45 percent of assessed stream miles, 47 percent of assessed lake acres, and 32 percent of assessed bay and estuarine square miles were classified as polluted.
Other than that, according to Department of Environment (DOE) research, dive two years about the level of pollution of rivers throughout the country, 91% of cases of river pollution is caused from man-made. This problem occurs because most people who use septic tanks refuse to cooperate with the parties involved to treat sewage waste. According to DOE of 16 categories as polluted rivers which are located mostly in the states of the rapidly developing as Penang, Johor and Selangor. Rivers in Selangor that have been identified pollution is Sungai Rephens, Sungai Tekala, Sungai Kundur, Sungai Gabai, Sungai Chenarek, Sungai Lepok and the Lowest is Sungai Congkak. Among these rivers, Sungai Rephens have a high number of koliform feces because there is a pen of cattle and sheep barn initiate by local residents.
That is related to our topic is Water Pollution. We choose this topic because some of the people not very concern about this issue and less of the cooperation. Besides that, the others purpose is increase the awareness to prevent the issue of the water pollution. Recently, water pollution become a big issue. In addition, we know that some of the glacier was become liquid. All of this are cause of global worming.
That’s why our group choose water pollution for our project topic. By the way, in recent years, water pollution issues felt very acute because many rivers and water catchment areas have experienced contamination. We feel necessary to increase awareness about the importance of being environmental pollution so that water does not Occur. We also feel that if this condition is not prevented from the beginning, future generations may not be able to view wildlife and river water is clear.
2. DEFINITION
Water is typically referred to as polluted when it is impaired by anthropogenic contaminants and either does not support a human use, like serving as drinking water, and/or undergoes a marked shift in its ability to support its constituent biotic communities, such as fish. Natural phenomena such as volcanoes, algae blooms, storms, and earthquakes also cause major changes in water quality and the ecological status of water. Water pollution has many causes and characteristics.
Water pollution to the addition of foreign substances (pollutants) to a water source. These impurities have a detrimental effect on water quality, and can be harmful to living organisms and aquatic life. Pollution can be introduced to water from both point sources and diffuse sources. Common sources of pollutants include man-made, industrial waste and domestic sewage and natural sources such as soil erosion and silt-bearing runoff.
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.
The definition also includes any solid, liquid or gaseous waste and all other substances whose cause water pollution or a violation.
3. CAUSE OF WATER POLLUTION
The water pollution in Malaysia is originated from point sources and non-point sources. Point sources that have been identified include sewage treatment plants, manufacturing and agro-based industries and animal farms. Non-point sources are mainly diffused ones such as agricultural activities and surface runoffs. According to Malaysia Environment Quality Report 2004, the Department of Environment has recorded 17,991 water pollution point sources in 2004 comprising mainly sewage treatment plants (54%), manufacturing industries (38%), animal farms (5%) and agro-based industries (3%). The distribution of the water pollution sources is shown in Figure 1 below.
Figure 1: Composition of Water Pollution Sources by Sector, 2004
3.1. Industrial sewage
Industrial activities is a major source of increased discharge waste water containing heavy metals into the rivers. In 1995, industry contributed 65% of sewage pollution to the river in terms of BOD. Its followed by agricultural activities. Some irresponsible entrepreneur channeled the toxic waste direct to the river. They also deliberately throw the industrial like solid waste or toxic waste direct to the river. This will cause of death aquatic life. More than that, it will make healthy problem to human.
3.2. Livestock Animals
Unclean animal filth-channeled into the river without thought to the environment impact. This can be proved through the discovery TV3 journalist in the Islamic University College of Science, Kuala Sungai Baru Melaka. The pig farmers have continued to release pig droppings into the river that flows directly into the sea. This is causing water and air pollution.
3.3. Sacrificed Center
The operators also contributors to the central slaughtering of water pollution. They remove waste slaughter as blood, stool, stomach and other animals that are slaughtered in the rivers. This disrupt the ecosystem.
3.4. Restaurant and Food Outlets
Attitude of some owners restaurants and food outlets to remove the remaining food to their customers in the drains which flow directly into rivers also contribute to water pollution. This condition is mainly done by traders who trade on the sea.
3.5. Domestic Waste
There also some irresponsible resident removing trash into rivers. Rubbish such as empty bottles, plastic bags, and papers, and foods remaining, that are not used removed without thinking of the river aquatic life and the resident that use river as main source of water.
3.6. Wet Markets and Wholesale Markets.
Vendors at the wet markets and wholesale markets also contribute occurrence of water pollution. Traders remove their waste sales revenue down the drain where the duct directly into rivers. This directly led to the river became polluted.
3.7. Septic Tank Sewage
Cost saving for residential septic tanks and sewage treatment plant, there are some people who are not responsible to take the easy way with the filth of sewage into the channel rivers.
3.8. Thermal Pollution
Thermal pollution is the rise or fall in the temperature of a natural body of water caused by human influence. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. Elevated water temperatures decreases oxygen levels (which can kill fish) and affects ecosystem composition, such as invasion by new thermophilic species. Urban runoff may also elevate temperature in surface waters.
Thermal pollution can also be caused by the release of very cold water from the base of reservoirs into warmer rivers.
3.9. Soil Erosion
Water pollution can also occur naturally from the effects of soil erosion and sediment plants that have died and decay.
3.10. Sedimentation
Water pollution occur as a result of land development for housing exploration activities, industry, agriculture, logging, sand mining and others.
3.1. Industrial sewage
Industrial activities is a major source of increased discharge waste water containing heavy metals into the rivers. In 1995, industry contributed 65% of sewage pollution to the river in terms of BOD. Its followed by agricultural activities. Some irresponsible entrepreneur channeled the toxic waste direct to the river. They also deliberately throw the industrial like solid waste or toxic waste direct to the river. This will cause of death aquatic life. More than that, it will make healthy problem to human.
3.2. Livestock Animals
Unclean animal filth-channeled into the river without thought to the environment impact. This can be proved through the discovery TV3 journalist in the Islamic University College of Science, Kuala Sungai Baru Melaka. The pig farmers have continued to release pig droppings into the river that flows directly into the sea. This is causing water and air pollution.
3.3. Sacrificed Center
The operators also contributors to the central slaughtering of water pollution. They remove waste slaughter as blood, stool, stomach and other animals that are slaughtered in the rivers. This disrupt the ecosystem.
3.4. Restaurant and Food Outlets
Attitude of some owners restaurants and food outlets to remove the remaining food to their customers in the drains which flow directly into rivers also contribute to water pollution. This condition is mainly done by traders who trade on the sea.
3.5. Domestic Waste
There also some irresponsible resident removing trash into rivers. Rubbish such as empty bottles, plastic bags, and papers, and foods remaining, that are not used removed without thinking of the river aquatic life and the resident that use river as main source of water.
3.6. Wet Markets and Wholesale Markets.
Vendors at the wet markets and wholesale markets also contribute occurrence of water pollution. Traders remove their waste sales revenue down the drain where the duct directly into rivers. This directly led to the river became polluted.
3.7. Septic Tank Sewage
Cost saving for residential septic tanks and sewage treatment plant, there are some people who are not responsible to take the easy way with the filth of sewage into the channel rivers.
3.8. Thermal Pollution
Thermal pollution is the rise or fall in the temperature of a natural body of water caused by human influence. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. Elevated water temperatures decreases oxygen levels (which can kill fish) and affects ecosystem composition, such as invasion by new thermophilic species. Urban runoff may also elevate temperature in surface waters.
Thermal pollution can also be caused by the release of very cold water from the base of reservoirs into warmer rivers.
3.9. Soil Erosion
Water pollution can also occur naturally from the effects of soil erosion and sediment plants that have died and decay.
3.10. Sedimentation
Water pollution occur as a result of land development for housing exploration activities, industry, agriculture, logging, sand mining and others.
As a conclusion, the main causes of water pollution is man-made. Some greedy man only concerned about profit without thinking about the effects of environmental damage.
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