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unit 22

STD X BIOLOGY<br>ENVIRONMENTAL MANAGEMENT<br>TAMILNADU SAMACHER SYLLABUS

sheelalesly
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unit 22

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  1. NON RENEWABLE RESOURCES • MINERAL ORE • COAL • PETROLEUM • CANNOT BE RECYCLED OR REPLACED EASILY • MAY COME TO AN END AFTER A CERTAIN PERIOD • RENEWABLE RESOURCES • FORESTS • WILDLIFE • CROPS • GROUNDWATEWR • WIND ENERGY • SUN ENERGY • MAINTAINED BY RECYCLING OR REPLENISHED BY PROPER MANAGEENT • NEED FOR CONSERVATION • EXPANDING HUMAN EXPLOITATIUON RESULTED IN EXPANDING NEEDS LEADING TO • DEMAND OF NATURAL RESOURCES

  2. CONSERVATION JUDICIOUS USE Proper utilization and management of nature and its resources • Excess , unplanned usage of natural resources • Exploitation , replenishment of resources

  3. Habitat for animals and plants • Contribute to the economic development of the country • Vital for human life • Source for renewable natural resources • Act as a carbon sink • Regulate climatic condition • Increase rainfall • Reduce global warning • Prevent natural hazards • Catchment for water conservation • Maintain ecological balance FOREST AND ITS IMPORTANCE

  4. DEFORESTATION • Intensive agriculture • Urbanization • Construction of dams , roads, buildings, industries • Construction of hydroelectric projects, roads • Forest fire • EFFECTS • Threat to economy • Quality of life • Quality of future environment • Ecological problem like flood, drought, soil erosion , loss of wildlife • Imbalance of biogeochemical cycle • Alteration of climatic condition • Desertification DEFORESTATION AND EFFECTS

  5. CONSERVATION OF FORESTS • Protected forests area • Afforestation programme[ Van Mahotsav ] - planting of trees • Social forestry programme-safeguard future of tribals • Conservation through laws- National Forest Policy • Forest Conservation Act • Undomesticated animals in natural habitats - promotes economic activities & tourism.[ WILDLIFE CONSERVATION]

  6. To control and limit exploitation • To preserve plants and animals from distinction • Maintenance of threatened species or species on the verge of extinction. • Preserve the endangered species • To study the ecological relationship of the plants and animals in natural habitat • Hunting and poaching should be prohibited • Establishment of national park ,wildlife sanctuaries, protected areas ,and biosphere reserves. • Jim Corbett National Park –1936, Uttarakhand , India • 15 biosphere reserves [ Niligris in Tamilnadu ] AIMS OF WILD LIFE CONSERVATION

  7. OGANIZATION INVOLVED IN CONSERVATION 5. 1. 3. 2. 6. 4. 7. WILD LIFE PRESERVATION DEHRADUM

  8. WILDLIFE CONSERVATION INITIATIVES SEA TURTLE PROJECT TURTLE PROJECT 1999 [1992] [1973] ASSAM CROCODILE PROJECT [ 1976 ]

  9. SOIL EROSION • EFECTS • Loss of humus ,nutrients • Decreases the fertility of the soil. • MANAGEMENT • Retain vegetation • Controlled cattle grazing • Crop rotation • Soil management to improve soil organic matter • Reforestation , terracing , contour ploughing • Plant trees as shelter belt to control wind speed REMOVAL OF TOP SOIL AGENTS Highvelocity wind , flowing water, landslide Deforestation Farming Mining overgrazing,

  10. RENEWABLE RESOURCES FORESTS WILDLIFE CROPS GROUNDWATEWR WIND ENERGY SUN ENERGY NON RENEWABLE RESOURCES MINERAL ORE COAL PETROLEUM

  11. CONSERVATION Save electricity to reduce the usuage of coal USE BICYCLE

  12. SOLAR ENERGY DEVICE Harnessing energy

  13. BIO GAS -GOBAR GAS

  14. NON CONVENTIONAL ENERGY CONVENTIONAL ENERGY • RENEWABLE ENERGY NON RENEWABLE ENERGY INEXHAUSTIBLE EXHAUSTIBLE • Renewable energy source is non polluting. • Safe and convenient to use ; Eco friendly . • Inexhaustible or non perishable and to develop a sustainability . • To reduce the dependence on depleting conventional energy. • No emission of pollutants and green house gases. • Non conventional energy like solar wind water helps to generate electricity • Low operating costs and cheaper energy source at market

  15. Devices using solar energy like solar cooker ,heater, pump, calculator, automobiles run by solar energy are not only safe to use but also ecofriendly. • Bio gas ,an inexhaustible energy source ,as smokeless is also ecofriendly contributing 14% o global energy supply. • Management of renewable water energy resources enhances to generate electricity . • Electricity is generated from solar, wind ,water and tidal energy sources . Windmill farm of kanyakumari generates 380mw oF electricity. • Management of solid helps in recovery of conventional energy resources and therefore to a clean healthy environment • So Non- Conventional sources of energy are becoming our future and so is an alternate energy source to conventional energy

  16. WIND ENERGY WIND ENERGY FARM

  17. WATER ENERGY

  18. TIDAL ENERGY

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