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

Explain two types of transferases, Explain two types of transferases ? ...

Explain two types of transferases ? a) Alanine aminotransferase Alanine + a-ketoglutarate ↔ glutamate + pyruvate b) Aspartate aminotransferase (AST) Asparate + a-ketogl

Bdp, describe the factors which decide the broad area of scientific activit...

describe the factors which decide the broad area of scientific activity?

Nutrition, 1. A patient with Chronic Kidney Disease (Stage IV), who ma...

1. A patient with Chronic Kidney Disease (Stage IV), who makes very little urine, presents to the hospital with severe nutritional deficiencies.  You are starting her

Egg or chicken, what comes first? egg or chicken?

what comes first? egg or chicken?

Water and wastewater treatment, Disinfection of water streams originating f...

Disinfection of water streams originating from potable water plants is key in protecting environmental health. Describe the process design and application, along with potential pro

How did the earth form and become spherical, How did the Earth form and bec...

How did the Earth form and become spherical? The Earth's Shape : About five billion years ago the solar system was forming from gases and dust floating in space. Gravity, th

Environmental accidents can be of various kinds, Question 1 What are th...

Question 1 What are the sources of water pollution? List some measures that can help overcome the problem of water pollution Question 2 Environmental accidents can b

Determine the mechanical parameters of soil, Mechanical parameters Soil...

Mechanical parameters Soil is a heterogeneous mixture of organic matter, salts, metal oxides, water and air with silicates as dominant constituents of varying size and composit

Compare and contrast the different types of igneous rocks, 1.) Referring di...

1.) Referring directly to the locations of igneous activity identified on the below diagram (figure 5), and restricting yourself to any of the following terms and rocks (sedimentar

Discuss about the soil fauna, Discuss about the Soil Fauna The soil fa...

Discuss about the Soil Fauna The soil fauna inhabiting the soil are active partners of the soil flora in the decomposition of plant tissues.  When dead leaves fall on moist so

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