Soil pollution, Science

Assignment Help:

Soil Pollution:

The problem of soil pollution is rapidly increasing in  the rural, urban and industrial areas due to unscientific and irrational disposal of solid wastes generated by  human beings from their domestic  and industrial activities.  In many rural parts of our country, daily thousands of people pollute the soil through their wastes, as toilet facilities are not available. In industrial areas heavy metals, plastics and other persistent organic  compounds including msticides, are the major causes of soil pollution. Hazardous wastes in soil, often accummulate in the bodies of organisms  including man, because they are not excreted. Once they enter the food chain,  they become more concentrated at each level. Note  in Fig. how DDT, a pes'ticide, becomes more concentrated  as it passes along fmm producer to consumers. The story of DDT is one everybody should know. It was once a widely used pesticide. It  is a substance that does not easily break down. It can persist in  the environment for as long as fifteen years.  It enters birds through the organisms they  feed on which in turn get it from the organisms lower in the food chain. When a high concentration builds up in birds.  their reproductive systems are affected. As a result they  lay fragile eggs that easily break in the nests. Similarly other pesticides are also major soil pollutants, because of  their retention in soil. The pesticides not only kill the targeted pests, but also kill many harmless and even beneficial insects. They cause more harm than benefit. Therefore, DDT and many such agrochemicals  have been banned in many parts of  the world.  

 

1931_Soil Pollution.png

What should be done to minimise soil pollution? First of all, in  India, the use of open fields and banks of ponds and tanks as open toilets should be stopped, by providing latrines. Care should be taken while dumping wastes in the soil. Substances  such as heavy metals, plastics and other substances  that remain unchanged for very long time should not be added to the soil. Instead ways should be found for their reutilisation by  various recycling processes. Utmost care should be  taken so  that the minimum necessary pesticides or other agrochemicals are used.  In  fact. biological control of pests and fixation of nitmgen should be urgently developed by  rcsearch, so that dependence on widespread use of  toxic chemicals is reduced.  


Related Discussions:- Soil pollution

What is the meaning of manures, What is the meaning of Manures The way ...

What is the meaning of Manures The way fertilizers affect soil productivity, organic matters in soil are also associated with soil fertility.  This is because a soil rich in or

Explain the rectum and anal canal, Explain the Rectum and Anal Canal R...

Explain the Rectum and Anal Canal Rectum: This is a slightly dilated part of the colon. It leads from the pelvic colon. Anal canal: This is a short canal which leads fro

State about the oxidised forms of elements, State about the Oxidised forms ...

State about the Oxidised forms of elements Oxidised forms of elements are more desirable for most common crops grown in acid soils and humid regions while the reduced forms of

A compressed air pop-gun, A compressed air pop-gun Use a straight piece...

A compressed air pop-gun Use a straight piece of glass or plastic tubing of 1 or 2 cm in diameter and 15 or 20 cm in length. Make a piston by twisting some string on a pencil t

Explain cephalic phase or neural phase, Explain Cephalic Phase or Neural Ph...

Explain Cephalic Phase or Neural Phase 45% of the total gastric secretion is discharged in this phase. The flow of juice occurs before food reaches the stomach. Sight of food,

Forest cover, Forest cover: An analysis of satellite imageries and ai...

Forest cover: An analysis of satellite imageries and air photos indicates that in  1982 about  1 I%of land area in India was thick forests and the remaining 3% degraded or th

Fst-01, Give reason for the benifits of our technological development not r...

Give reason for the benifits of our technological development not reaching all the strata of our society.

Objectives radiation and chemical hazards, Objectives After studying th...

Objectives After studying this unit, you should be able to: 1.  Categorise different radiations into ionising and no ionising types, 2.  Explain the effects of radiations

What is the important consequence of soil aeration, What is the Iimportant ...

What is the Iimportant consequence of soil aeration Another important consequence of soil aeration is oxidation-reduction reactions  that take place in soil and this may decide

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd