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Program – CIVIL ENGINEERING, Program Code – CE, Course- ENVIRONMENTAL STUDIES, Course Code – 22447, 08/07/2020, , MSBTE LEAD- STUDY AT YOUR DOORSTEP, , Ms. Swati Ingale, Course Expert, Lecturer, NIT Polytechnic,, Nagpur
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Unit II: Energy Resources, CO 2: Select alternative energy resources for, Engineering Practices, UO 2c: State the causes and effects of depletion of, resources., UO 2f: State the impacts of over use of natural, resources., 08/07/2020, , Written by, Mr. N. U. Sulbhewar, Course Expert, Lecturer, Government Polytechnic,, Gadchiroli, , Ms. Swati Ingale, Course Expert, Lecturer, NIT Polytechnic,, Nagpur, , Dr. N.S.Raman, Course Expert, Deputy Director, NEERI,, Nagpur
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What we will learn today?, Learning Objective/ Key takeaways:, •, Know the Causes and effects of depletion of, resources, •, Understand impacts of over use of natural, resources on environment., Contents:, 2.3 Causes and effects of depletion of resources, 2.7 Overuse of natural resources and its impacts, on environment, , Concept Map, Natural, Resources, , Exploitation or, Overuse, , Depletion, , Impacts on, Environment, , Page 3, , Maharashtra State Board of Technical Education, , 21 October 2021
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Depletion of Natural Resource, ►, , ►, , Resource Depletion occurs when, the renewable and non-renewable, natural resources become scarce, because they are consumed faster, than they can recover., All of these resources have been, depleted primarily because of, human activities., , Overpopulation, , Over, Consumption, , Pollution, , Depletion of, , Natural, Resources, Industrial, Development, , wastage, , Mining, Activities, , Page 4, , Maharashtra State Board of Technical Education, , Deforestation, , 21 October 2021
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Causes of depletion of Natural Resource, 1. Overpopulation:, ► “Population growth is driving all of our resource problems, including water,, agricultural land and energy,”, ► The Earth can only produce a limited amount of water and food, which is, falling short of the current needs., 2. Overconsumption:, ► This is the excessive and unnecessary use of resources., ► Natural resources in many regions are owned by private companies but they, misuse it for getting more profit., 3. Wastage:, ► Without paying much attention, we use a lot of electric energy each day from, charging electronics to watching TV, ► Similarly Water is also wasted in various domestic and industrial works., Page 5, , Maharashtra State Board of Technical Education, , 21 October 2021
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Causes of depletion of Natural Resources, 4. Deforestation:, ► Natural calamities like hurricanes, forest fires, parasites and, floods destroys the Forests, ► Human activities as agricultural expansion, cattle breeding,, timber extraction, mining, oil extraction, dam construction and, infrastructure development., 5. Mining of Minerals and Oil., ► The increased exploitation of different minerals has led to, some of them entering into a production decline., ► For example, minerals such as Gasoline, Copper, and Zinc, production are estimated to decline in the next 20 years., , Page 6, , Maharashtra State Board of Technical Education, , 21 October 2021
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Causes of depletion of Natural Resources, 6. Technological and Industrial Development:, ► Industrial and technological advancements have also driven the, demand for virgin materials for research, development,, and production., ► More resources are hence being used to satisfy, the industrial demands, increasing the rate of natural resource, depletion., 7. Pollution and Contamination of resources:, ► The poor quality of wastewater effluents is responsible for the, degradation of the receiving surface water body. It is harmful for the, aquatic ecosystem., ► The wrong Agricultural practices contaminates the land resources, and make it unsuitable for crop production, , Page 7, , Maharashtra State Board of Technical Education, , 21 October 2021
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Effects of depletion of Natural Resource, , Page 8, , Water, shortage, , Oil depletion, , Forest, depletion, , Mineral, depletion, , Natural gas, depletion, , Food, depletion, , Maharashtra State Board of Technical Education, , 21 October 2021
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Overuse of Natural Resources, ►, , We derive numerous useful substances from natural, resources but when 'need' turns to 'greed' it starts, over exploitation., , impacts of Overuse of Natural Resourceson, environment, 1. Deforestation., 2. Desertification, 3. Soil erosion, 4. Land Slides, 5. Extinction of species, ►, , Page 9, , Maharashtra State Board of Technical Education, , 21 October 2021
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1. Deforestation, Deforestation is the clearance of forests by logging and/or, burning., ► Trees absorb greenhouse gases and carbon dioxide and produce, the oxygen we breathe., ► Forests are the habitats of millions of species., ► Causes of Deforestation, 1. Construction of Roads, 2. Mining, 3. Hydroelectric projects, 4. Forest fires, ► Effects of Deforestation, The loss of trees and other vegetation can cause climate change,, desertification, soil erosion, fewer crops, flooding, increased, greenhouse gases in the atmosphere., ►, , Page 10, , Maharashtra State Board of Technical Education, , 21 October 2021
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2. Desertification, Desertification is a process by which fertile land becomes, desert., ► Causes for the origin of manmade deserts, 1. Removal of trees ., 2. Modern methods of agriculture instead of more traditional., 3. Over exploitation of fertile soil particularly in areas of low, rainfall by cultivating cash crops., ► Effects of Desertification, •, It reduces the ability of land to support life, affecting wild, species, domestic animals, agricultural crops and people., •, The reduction in plant cover results in Drought leads to, accelerated soil erosion by wind., ►, , Page 11, , Maharashtra State Board of Technical Education, , 21 October 2021
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3. Soil erosion, ►, , It is the washing or blowing away of the top layer of the soil., , Manmade Causes of soil erosion, overgrazing by cattle, cutting down of trees, agricultural activities, construction, of buildings and laying of roads., ►, , Effects of soil erosion, 1. It washes away the nutrients in soil resulting in infertility of the soil., 2. It has led to increased pollution and sedimentation in streams and rivers,, clogging these waterways, 3. Degraded lands are also often less able to hold onto water, which can worsen, flooding., ►, , Flood, Page 12, , Maharashtra State Board of Technical Education, , 21 October 2021
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4. Land Slides, ►, , It is the movement of rock, earth, or debris down a sloped, section of land., , Natural Causes of Landslides, Rain, Cyclones, Earthquakes, Volcanoes, ►, , Manmade Causes of Landslides, Unsafe Mining Activities, construction of dams, ►, , Effects of Landslides, The cost to repair structures, loss of property value, disruption, of transportation routes, medical costs in the event of injury,, loss of timber, Water availability., ►, , Page 13, , Maharashtra State Board of Technical Education, , 21 October 2021
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5. Extinction of species, ►, , Extinction occurs when species are diminished, because of environmental forces, , ►, , Causes of Extinction of species, habitat fragmentation, natural disaster, decline in population numbers due to poor, reproduction, overexploitation of species for human use, , 1., , 2., 3., , 4., , Effects of Extinction of species, extinction can also impact populations of prey, which, can cause dramatic ecosystem and food web changes., , Tasmanian Tiger, , Formosan Clouded Leopard, , passenger Pigeon, , Pyrenean Ibex., , ►, , Page 14, , Maharashtra State Board of Technical Education, , 21 October 2021
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Solutions for Conserving Natural Resources, ►, ►, ►, , ►, , ►, ►, , ►, , ►, ►, ►, , Page 15, , Controlling deforestation, Reducing oil, mineral consumption, More exploration and use of Renewable source of energy, like biogas, biofuels etc, Protecting wetlands and coastal ecosystem, Awareness creation, Treatment of industrial wastes and sewages before release, in the water bodies., Rain water harvesting., Ensure the recycling of wastes., Sustainable farming practices like crop rotation., Constructions of reservoirs, , Maharashtra State Board of Technical Education, , 21 October 2021
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Refferences:, 1., , 2., , 3., , 4., , 5., , Page 16, , Prof. Erach Bharucha, 2004. Textbook for Environmental Studies. University Grants, Commission, New Delhi, India., Dr. Y. K. Singh, 2006. Environmental Science. NEW AGE INTERNATIONAL (P) LIMITED,, PUBLISHERS, New Delhi, India., Dr. J. P. Sharma, 2009. Environmental Studies, 2nd Edition, Laxmi publications, New Delhi,, India., M.P. Singh, 2005, Environment and Natural Resources Hardcover, Satish Serial Publishing, House, Delhi India., R. Rajgopalan, 2011. Environmental Studies: From crisis to cure, Oxford University Press,, New Delhi, India., , Maharashtra State Board of Technical Education, , 21 October 2021
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Natural Resources are Very Important, Say No to Exploitation, , The knowledge of importance of, Natural resources is very essential to, understand the its applications, Global, need, and future demands, , Page 17, , Maharashtra State Board of Technical Education, , Say Yes To Conservation, , Once you understand the importance of, natural resources, you will understand, the need of its conservation, , 21 October 2021
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Summary, , We have studied :, ► Causes and effects of depletion of, resources, ► Overuse of natural resources and its, impacts on environment, , Page 18, , Maharashtra State Board of Technical Education, , 21 October 2021
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THANK YOU ALL, Section divider over two lines or three, lines, , HAVE A NICE DAY, , Now let’s have a Quiz....., Page 19, , Maharashtra State Board of Technical Education, , 21 October 2021
