cx-Environmental-issues-Slides-Full-edited

<h4 id="success-stylefloatcentertext-aligncenterfont-size28pxbenvironmental-issuesbsuccess-100"><Success style="float:center;text-align:center;font-size:28px;"><b>ENVIRONMENTAL ISSUES</b></Success></h4>
<h4 id="primary-stylefloatcentertext-aligncenterfont-size24px-blong-answer-questionsb-primary"><Primary style="float:center;text-align:center;font-size:24px;"> <b>LONG ANSWER QUESTIONS</b> </Primary></h4>
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<p><strong>Solution :</strong></p>
<p>Electronic waste is those which are the residue of electronic applications after usage, like phone batteries, computers, televisions etc. These wasters are buried in the land, which causes soil pollution as well as air pollution. Over half of the e-waste generated in developed countries like the USA, UK, etc., is exported to developing countries like India, Pakistan and China. The developed countries have proper and specifically built facilities for recycling e-waste. In some countries, it has also been recycled. E-waste contains many toxic metals, which are harmful and cause diseases.</p>
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<h4 id="success-stylefloatcentertext-aligncenterfont-size28pxbenvironmental-issuesbsuccess-104"><Success style="float:center;text-align:center;font-size:28px;"><b>ENVIRONMENTAL ISSUES</b></Success></h4>
<h4 id="primary-stylefloatcentertext-aligncenterfont-size24px-blong-answer-questionsb-primary-2"><Primary style="float:center;text-align:center;font-size:24px;"> <b>LONG ANSWER QUESTIONS</b> </Primary></h4>
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<p><strong>Solution :</strong></p>
<p>Waterlogging and soil salinity are some of the problems that have come in the wake of the Green Revolution.<br>
Causes:<br></p>
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<li>Irrigation without a proper drainage system.<br></li>
<li>The continuous presence of water draws salt to the surface of the soil, which gets deposited as a thin crust on the land surface or starts collecting at the roots of the plants.<br></li>
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<p><strong>Adverse effects:</strong></p>
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<li>Increased salt content causes a reduction in the growth of crops which causes extreme damage to agriculture.<br></li>
<li>Root cells get shrunk due to saline water.</li>
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<h4 id="success-stylefloatcentertext-aligncenterfont-size28pxbenvironmental-issuesbsuccess-110"><Success style="float:center;text-align:center;font-size:28px;"><b>ENVIRONMENTAL ISSUES</b></Success></h4>
<h4 id="primary-stylefloatcentertext-aligncenterfont-size24px-blong-answer-questionsb-primary-4"><Primary style="float:center;text-align:center;font-size:24px;"> <b>LONG ANSWER QUESTIONS</b> </Primary></h4>
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<p><strong>Solution :</strong></p>
<p>An electrostatic precipitator is a device which is used to extract the suspended dust particles from the gas.</p>
<p>It uses a high-voltage charge to collect particles on the charged plates. It has electrode wires which are maintained at high voltages. This produces a corona, which releases an electron. A net negative charge will be attained by the dust particles, and those are collected by the collecting plates. The velocity of air between plates is kept low to allow the dust particles to fall and settle down. An electrostatic precipitator can remove over 99% of particulate matter present in the exhaust from a thermal power plant.</p>
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<h4 id="success-stylefloatcentertext-aligncenterfont-size28pxbenvironmental-issuesbsuccess-113"><Success style="float:center;text-align:center;font-size:28px;"><b>ENVIRONMENTAL ISSUES</b></Success></h4>
<h4 id="primary-stylefloatcentertext-aligncenterfont-size24px-blong-answer-questionsb-primary-5"><Primary style="float:center;text-align:center;font-size:24px;"> <b>LONG ANSWER QUESTIONS</b> </Primary></h4>
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<p><strong>Solution :</strong></p>
<p>i) The ecological term used to describe DDT accumulation at different trophic levels is Biomagnification.</p>
<p>ii) The high concentration of DDT in birds disturbs their metabolism resulting in thinning of their eggshells and their premature breaking.</p>
<p>iii) Yes, DDT accumulation leads to eutrophication which is a natural ageing of a water body due to excess nutrition.</p>
<p>iv) DDT accumulation leads to eutrophication (increased life in a water body) which ultimately results in increased Biological Oxygen Demand.</p>
<p>v) Minamata Disease due to Mercury, Black foot due to Arsenic and Itai-Itai due to Cadmium.</p>
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