Sabtu, 23 Oktober 2010

What is the Cause of Water Pollution???

Water pollution refers to the changes in the physical, biological, and chemical conditions of any body of water which harmfully disrupts the balance of the ecosystem.
Like any type of pollution, water pollution results when an overwhelming amount of waste coming from different sources of pollutants can no longer be accommodated by the natural ecosystem. Consequently, when the wastes are not destroyed as fast as they are produced, they make it unfavorable to humans and many other organisms. But that's not all. Learn more about what causes water pollution.
There are actually many specific reasons behind what causes water pollution. However, it is important to familiarize yourself with the two main categories of water pollution. Some pollution comes directly from one's specific location. This type of pollution is called point source pollution such as sewage pipes that empty polluted water into the river and farmland. Meanwhile, non-point source pollution is pollution that comes from large areas like gasoline and other dirt from highways that go into the lakes and rivers.
What are the causes water pollution? Who are the culprits who should be responsible for the harm brought by their pollutants? How do these sources of pollution pollute different bodies of water?
One major cause of water pollution that has caused serious environmental and health problems are the pollutants coming from chemical and industrial processes. When factories and manufacturers pour their chemicals and livestock wastes directly into streams and rivers, the water becomes poisonous and oxygen levels are depleted causing many aquatic organisms to die. These wastes include solvents and toxic substances. Most of the wastes are not biodegradable. Power plants, paper mills, refineries, automobile factories dispose waste into the rivers.
The heated water from the power plants is called thermal pollution. This kills aquatic animals and plants by reducing the oxygen content of the water. Power plants use water to cool their machineries, thus changing the temperature of the water.
Aside from thermal pollution, there are also organic and inorganic pollutants. The organic wastes include refuse from slaughter houses, fish and meat canning factories, and leather tanning companies, manufacturing plants, pesticides and crude oil companies. Since organic wastes are decomposed by microorganisms, much of the dissolved oxygen in water is used up and the waster begins to stink.
Inorganic wastes include toxic and corrosive substances like acids, heavy metals, mercury, cadmium and lead which can impair the normal body processes. Battery manufacturers, mining, paper mills increase the concentration of mercury making the water dangerous and poisonous for most living things.
Another cause of water pollution is from pesticides. Farm pesticides poison aquatic plants and animals. Animal manure, chemical fertilizers, phosphate detergent pollute water by supplying excess nutrients. This pollution is known as eutrophication. This greatly increases the growth of algae in water thereby decreasing the amount of oxygen level in water causing the death of many aquatic organisms.
Water is also being polluted by garbage specifically plastics and other plastic-like substances. Some plastic like nylon can entangle fishes and other marine animals. Plastics that have broken down into tiny pieces can be eaten by sea creatures which may cause their death. Since plastic is non-biodegradable, it will continue to kill more fishes.
One more cause of water pollution is sewage coming from households. Since no one wants to live in a polluted area, near a dumpsite or landfill, the wastewater and untreated sewage are carried away from the home polluting different bodies of water. Most developing countries practice this type of sewage disposal. Even modern countries carry poorly treated sewage to canals leading to major bodies of water. The danger is when the sewage pipes gets broken and waste contaminates the drinking water. When this happens, the breakage will open a wide array of water borne diseases that will surely pose peril to consumers.
Last among the causes of water pollution are personal care and household products. Shampoo, lotion, moisturizer, hair dye, bleach, laundry detergent, fabric softener, and many others contribute to water pollution. Human waste is not the only thing that goes to sewage. These products also join the wastewater to contaminate the streams, rivers, and lakes.
Although the world abounds with water, only three percent of it is potable. Included in the 3% source of potable water are the streams, spring, rivers, lakes, and waterfalls that are continuously being threatened and contaminated by the different factors that cause of water pollution. If the sources of water pollution are not controlled, this basic necessity will eventually become a rare commodity only a few can afford to have.

Create by Zurina Zakaria a123555...

6 ulasan:

  1. According to the Environmental Protection Agency (EPA), reported that in 1995, approximately 37 percent of the countries lakes, and about 36 percent of its rivers, are too polluted to be used for swimming or fishing throughout the entire year (Pollution). Int hat cases, water pollution is very harmful to our environment. Rainwater runoff can carry chemicals used to kill animals and plants into streams polluting them. Besides that, for marine pollution is fossil fuel spills. For instance, the wrecks of the tanker Amoco Cadiz in 1978 and the Exxon Valdez in 1992 (Water Pollution).

    From, Zurina Zakaria.a123555

    BalasPadam
  2. thanks ina because you done put your article in we blog...i very happy n proud with you..thanks ang love you...good luck for your final exam

    izah

    BalasPadam
  3. i happy to....kih3..
    love u all..n good luck for final exam...

    -unai-

    BalasPadam
  4. welcome..I hope we can do well in exams tomorrow and get good result in ESS especially..haha..and don forget to continue the discussion in this blog even though we already finish exam later..

    ina...

    BalasPadam
  5. iN ADDITION, 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

    Inaaaa...

    BalasPadam
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