HI
Water bodies in locality are polluted mainly due to deforestation and cultivable land being converted into residential and industrial areas. To preserve waterbodies and avoid pollution of them, best is to stop infiltration of human population in and around the water bodies and following proper methods of disposal of wastes.
2006-11-09 10:06:01
·
answer #2
·
answered by Venus Victor 1
·
0⤊
0⤋
Yes, your location would be a factor, but you can damned well bet all sources of pollution are humakind. We're the worst offenders to the environment there can be.
2006-11-09 09:42:30
·
answer #3
·
answered by dazedandconfused 4
·
0⤊
0⤋
i'm a ninth grade student from india and i had a project on ocean ecosystems. this excerpt is a part of that project best of luck i think you'll find useful and give me 10 points . 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.
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. Under natural conditions, lakes, rivers, and other water bodies undergo Eutrophication, an aging process that slowly fills in the water body with sediment and organic matter. 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. Three last forms of water pollution exist in the forms of petroleum, radioactive substances, and heat. Petroleum often pollutes waterbodies in the form of oil, resulting from oil spills. The previously mentioned Exxon Valdez is an example of this type of water pollution. These large-scale accidental discharges of petroleum are an important cause of pollution along shore lines. Besides the supertankers, off-shore drilling operations contribute a large share of pollution. One estimate is that one ton of oil is spilled for every million tons of oil transported. This is equal to about 0.0001 percent. Radioactive substances are produced in the form of waste from nuclear power plants, and from the industrial, medical, and scientific use of radioactive materials. Specific forms of waste are uranium and thorium mining and refining. The last form of water pollution is heat. Heat is a pollutant because increased temperatures result in the deaths of many aquatic organisms. These decreases in temperatures are caused when a discharge of cooling water by factories and power plants occurs.
2006-11-09 11:54:39
·
answer #4
·
answered by Anonymous
·
0⤊
0⤋
it is manly due to industrial waste or human waste
we can put check on industries
use sewage tretment plants
less use of pesticides
2006-11-09 09:43:53
·
answer #5
·
answered by ankit chandel 2
·
0⤊
0⤋