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

To show which types of soil hold water best, To show which types of soil ho...

To show which types of soil hold water best Tie cloth over the end of various lamp chimneys and then fill every one to within 8 cm of the top with dissimilar types of soil. Use

To measure the volume of air in the longs, To measure the volume of air in ...

To measure the volume of air in the longs Invert a bottle full of water so that its neck is in the surface of water in ajar. Introduce a glass or rubber tube into the neck and

Dissecting simple flowers, Dissecting simple flowers Label each of five...

Dissecting simple flowers Label each of five cards or pieces of White paper with one of the following words: stamens, pistil, petals,sepals,  receptacle .  Dissect a flower ca

Carbon cycle, The Carbon Cycle: We have seen that carbon is one of the ess...

The Carbon Cycle: We have seen that carbon is one of the essential elements  of all organic substances and it enters the ecosystem through the process of photosynthesis. Carbon is

Saturated zone of groundwater called, What is the upper surface of the satu...

What is the upper surface of the saturated zone of groundwater called: The Water Table

Define the measurement of extracellular fluid volume, Define the Measuremen...

Define the Measurement of Extracellular Fluid Volume  This method involves the use of dilution principle. A substance that can readily diffuse through the entire extracellular

Australopithecus, Australopithecus-The Transitional Human Forms By abou...

Australopithecus-The Transitional Human Forms By about two million years ago, there were several well established hominid ancestors in Africa. One of  the earliest of  these  i

Explain the structure and functions of liver, Explain the Structure and Fun...

Explain the Structure and Functions of Liver The liver is enclosed in a thin capsule and is completely covered by a peritoneum. The liver is described as having four lobes. As

Define the utilization of fatty acids, Define the Utilization of Fatty Acid...

Define the Utilization of Fatty Acids In the presence of oxygen, fatty acids are utilized to provide energy and heat. Waste products produced are carbon dioxide and water. Fatt

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