Natural Resources

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Text of Natural Resources

  • 1. By - Sakshi Pharsole

2. What is a NATURAL RESOURCE? 3. Why does it has to be managed Because of misconception that renewable is inexhaustible, natural resources are over exploited leading to several critical consequences which will put the future plant, animal and human society in serious risk. 4. With the unprecedented increase in the population in the last few decades, mankind faces a formidable problem of reduced water, food and other essential requirements. 5. Earth was very rich in Natural Resources. The endowment of earth was so rich that it could meet the demands of its inhabitants for a long time. 6. Resources include Land resource Water resource Energy resource 7. Vegetative Cover 8. Stakeholders Humans depend on the forests largely to meet rapidly growing demands for timber, fibre, fuel, fresh water and food. All use forest produce in one form or other, e.g., when used as timber, paper, herbs and spices. Modern approaches in forest conservation have found that enforcement of forest laws or policies that do not recognize the legitimate needs of different groups that depend on the forest, often fail in their objectives. When we consider the conservation of forests, we need to look at different stakeholders whose dependency on forest resources varies. 9. The Three Rs to save the environment :The three Rs to save the environment are Reduce, Recycle and Reuse. i) Reduce :- means using less of natural resources and avoiding wastage of natural resources. ii) Recycle :- means the materials like paper, plastic, glass, metals etc used for making things can again be used for making new things instead of synthesising or extracting new paper, plastic, glass or metals. iii) Reuse :- means using things again and again like the plastic bottles in which we buy jams, pickles etc can be again used for storing things in the kitchen. 10. One of the factor is Efficient use of natural resources of land, water, forest, energy and biological resources. 11. Sustainable natural resource management Sustainability is a multidisciplinary focus on ensuring the compatibility of economic growth, social progress and environmental stewardship. 12. Water :a) Uses of water :Water is a basic necessity for all living things. We use water for our daily needs, for agriculture, transportation, construction of buildings, roads, dams etc. Water is a natural habitat for aquatic organisms. Human activities are affecting the availability of water and causing pollution of water bodies.b) Dams :Advantages of dams :i) Irrigation of crops. ii) Producing electricity. iii) Supplying water to towns and cities. iv) To control floods.Disadvantages of dams :i) Social problems :- It displaces a large number of people who have to be rehabilitated. ii) Economic problems :- It is expensive and uses a huge amount of public money. iii) Environmental problems :- It causes deforestation and loss of biodiversity. 13. DAMS 14. c) Water harvesting (Rain water harvesting) :Water harvesting is collecting and storing rain water for future use. The common methods of water harvesting are :i) Digging pits, ponds, lakes etc. ii) Building small earthen dams or concrete check dams. iii) Construction of dykes. iv) Construction of reservoirs. v) Construction of rooftop collecting units in houses.d) Advantages of underground water :i) It does not evaporate easily. ii) It spreads out and recharges wells. iii) It provides moisture for irrigation of crops. iv) It does not get polluted easily. v) It does not provide breeding ground for mosquitoes and houseflies. 15. Different methods of water harvesting 16. RAINWATER HARVESTING 17. Coal and petroleum :Coal and petroleum are fossil fuels formed by the decomposition of dead plants and animals inside the earth after several millions of years. They are non-renewable sources of energy. Petroleum reserves may last for about 40 years and coal reserves may last for about 200 years. Coal and petroleum contain carbon, hydrogen, nitrogen and sulphur. When they are burnt, they release carbon dioxide and oxides of nitrogen and sulphur. Carbon dioxide is a green house gas which causes global warming. Oxides of nitrogen and sulphur combines with moisture in the air and produces acid rain. 18. MELTING OF POLAR ICERISE IN SEA LEVELS