Natural Resources.pptx Environmental science
- 1. Natural Resources By- Dr. Gauri Awati
- 2. Definition Resource is a main source or supply from which benefit is produced and has some utility. The elements of nature are not resources until people have found a value for them.
- 3. Natural Resources can be categorized as- • On the basis of level of development. i)Actual: Quantity is known ii)Potential: Quantity is unknown • On the basis of origin. i)Biotic ii)Abiotic • On the basis of distribution. i)Ubiquitous Resources ii)Localized Resources On the basis of availability. i)Renewable ii)Non-renewable
- 4. Land as a Resource • Covers up to 29% of Earth’s surface. • Important resources.
- 5. Types of Land Resources • Recreational • Transport • Agriculture • Residential • Commercial
- 6. Land Degradation Land degradation is caused by multiple forces, including extreme weather conditions, particularly droughts. It is also caused by human activities.
- 7. Desertification • Process leading to desert formation • Natural phenomenon linked to climate change • Removal of vegetal cover • Improper land use practices • Often starts as patchy destruction • May be temporary or permanent • Accelerates soil erosion
- 8. Causes of Desertification • Climatic Factors • Human factors • Interaction between climate and culture
- 9. Forests Uses of forests- • Production of oxygen • Reducing global warming • Habits for wildlife • Regulation of hydrological cycle • Soil conservation • Pollution moderators
- 10. Deforestation Removal of forest cover. Destruction of biotic potential of land leads to desertification. Continuous deforestation results in zero forests
- 11. Causes of Deforestation • Shifting cultivation • Fuel requirements • Raw materials for industrial use • Development projects • Growing food needs • Overgrazing
- 12. Effects of Deforestation • Threatens to wildlife species • Loss of biodiversity • Hydrological cycle gets affected • Problems of soil erosion • Loss of fertile soil • Landslides occur in hilly region • Global warming
- 13. Soil Erosion The denudation of the soil cover and subsequent washing down is described as soil erosion. Soil Formation and soil erosion are simultaneous and are usually balanced. But, they get unbalanced due to human activities.
- 14. Causes of soil erosion Human Activities:- • Deforestation • Over-grazing • Construction • Defective farming methods • Mining, etc. Natural Phenomena:- • Wind • Water • Glacier
- 15. Effects of Soil Erosion Effects of soil erosion • Degrades quality of land. • Reduced ability of soil to store water and minerals • Loss of newly-planted crops
- 16. Water Resources
- 17. Sources of water • Ground water • Surface water
- 18. Uses of water • Irrigation • Industrial • Domestic
- 19. Conflicts • Water conflict in the Middle east –Sudan, Egypt, Turkey • The Indus Water treaty-India, Pakistan • The Cauvery Water dispute- Tamilnadu, Karnataka • The Satluj- Yamuna link canal Punjab, Haryana
- 20. Energy Resources
- 21. Conventional Sources of Energy • Coal • Mineral oil and natural gas • Fire wood • Nuclear power • Hydro power
- 22. Non conventional Sources of Energy • Solar Energy • Wind Energy • Tidal Energy • Geothermal Energy • Biomass based Energy