Unit 09 Preserving the Environment Lesson 8 Looking back project

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<span class='text_page_counter'>(2)</span> UNIT 9 : PRESERVING THE ENVIRONMENT.

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<span class='text_page_counter'>(5)</span> What is soil pollution ? Soil pollution is all the phenomena do environmental soil contamination by polluting agents, when their concetration is increased excessively load of soils, especially the solid wastes of mining industry. In other words : environmental pollution is a result of human activities alter the ecological factors of the biome living in soil ..

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<span class='text_page_counter'>(8)</span> The cause of land pollution • Agriculture activities : the use of pesticides, plant protection drugs, growth stimulants.

<span class='text_page_counter'>(9)</span> • Buried, throw away garbage not reasonable.. • Contaminated surface water seeping into the soil..

<span class='text_page_counter'>(10)</span> • Deforestation and not additional reforestation.. • Mining and extraction industries polluting heavy metals: Cadimi(Cd), Mercury(Hg), Niken(Ni), Asen(As)….

<span class='text_page_counter'>(11)</span> Radioactivity pollution • Sources of soil contamination by radioactivity is the scrap of the atomic center, the atomic power plant, nuclear weapon test..

<span class='text_page_counter'>(12)</span> Thermal pollution Thermal pollution- causing sources is due to the cooling water disposing machinery equipment of thermal power plants, atomic, mechanical, … In some cases, thermal pollution is also caused by forest fires, that killed many creatures travel the land, doing environmental damage the land and make the soil lost..

<span class='text_page_counter'>(13)</span> The contamination by biological agents The contamination by biological is due to the method of pouring waste removal unsanitary or use fresh manure, fresh pond mud living waste fertilizer directly into the ground..

<span class='text_page_counter'>(14)</span> Affecting human health due to contact with the ground line, due to the evaporation of soil contaminants or toxins through the food chain..

<span class='text_page_counter'>(15)</span> Infuse the water circuit causing pollution of water resources..

<span class='text_page_counter'>(16)</span> Land erosion the decrease of soil fertility the lack of agricultural land and reduced crop productivity..

<span class='text_page_counter'>(17)</span> Loss of some animals that live in soil destruction of vegetation..

<span class='text_page_counter'>(18)</span> How to overcome and reduce land pollution ?.

<span class='text_page_counter'>(19)</span> • Treatment of waste before burial.. • Recycling some types of garbage , plastic bottles..

<span class='text_page_counter'>(20)</span> • Planting the tree genotypes resistant diseases.. • The use of biotechnology in industry. Reduce the use of chemical drugs..

<span class='text_page_counter'>(21)</span> • Keep the surface is not contaminated and sewage treatment plant before release.. • Ensure the safety of the radioactive factory..

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