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Population growth and Natural resources

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Presentation gives a simple image of population growth and natural resources.

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Population growth and Natural resources

  1. 1. By Sagar Divetiya Environment science & technology 110990135013 4th sem
  2. 2. 1. Human Population 2. Renewable and Non-Renewable resources 3. Water resources 4. Forest Resources 5. Energy Resources
  3. 3.  Find keywords in question  Remember points and write anything related to that  Use module as “map” not “book”  Cram points not paragraphs  Definitions are real boss in E.S.  Write exam paper according to time not marks  Draw big neat figure where needed
  4. 4.  Development of Habitation patterns and Environmental factors governing human settlement  Population & Pollution  Reasons for overpopulation or population explosion  Population Growth & its Theories  Demographic Projections
  5. 5.  Development of Habitation patterns and Environmental factors governing human settlement ◦ Habitat = place where a human lives ◦ Humans have tendency to settle in good environment, better facilities and availability of natural resources.  Population & Pollution ◦ Population forecasting/prediction methods  Reasons for overpopulation or population explosion  Increased birth rate  Increased longevity (long lives)  Reduced infant mortality (death rate of newly born babies)  Decreased death rate  Lack of education  Cultural influences (blind beliefs)  Immigration/Emigration ( Migration : moving from one place to another)
  6. 6.  Population Growth & its Theories ◦ Definition,  “Population growth is the change in population over time.”  More precisely, “population growth is the change in number of individuals in a population using per unit time for measurement.” ◦ Population growth theories  Malthusian Theory  Marxian Theory  According to Karl Marx, Population growth is a symptom rather than the cause of poverty, crime, starvation resource depletion and pollution.
  7. 7.  Demographic Projections/Transitions ◦ Demography definition,  “The scientific and statistical study of human population is called Demography.” It deals with  Changes in population (either growth or decline)  Composition of population (age group)  Distribution of population (birth, death, migration, aging) ◦ Demography transition  “If birth and death rates were equal, a zero population growth rate would result which is called DEMOGRAPHIC TRANSITION.”
  8. 8.  Population Structures ◦ Birth rate - Number of child birth per 100 people per year. ◦ Mortality - Mortality is the death rate per 1000 people per given time ◦ Infant mortality (death) rate - Deaths of infants per 1000 births, in a given year. ◦ Sex ratio - No. of females per 1000 males. ◦ Total Fertility Rate (TFR) - “Total fertility rate is the average number of children that would during her life time.” ◦ Age structure (Population pyramid) - “ Number of people or their percentage in each age group.”
  9. 9.  Food Resource ◦ Production of food  Sources of food  World food problems  Types of agricultural systems for food production ◦ Malnutrition or Malnourishment  “Malnourishment is the lack of specific components of food such as proteins, vitamins or essential chemical elements.” ◦ Undernourishment  “It is the lack of sufficient calories in available food, so that one has little or no ability to move or work.”
  10. 10. Renewable Resources Non-renewable Resources Destruction versus Conservation
  11. 11.  NOTE : If only resources or natural resources are asked then write from this chapter, and if energy resources are asked then write form 5th chapter.  Renewable Resources (Non Exhaustible Resources) ◦ Biotic (living resource) : Forest, Agriculture, Fish and wildlife ◦ Abiotic ( non living resource) : Land, water, minerals  Non-renewable Resources (Exhaustible Resources) ◦ Coal, petroleum, minerals, fossil fuels
  12. 12.  Destruction versus Conservation ◦ Destruction  Ground water overuse  Forest destruction (deforestation)  Fertile land destruction  Surface water destruction  Coal, oil and minerals destruction ◦ Conservation  Thus conservation of natural resources may help to reduce the destruction of natural resources.
  13. 13.  Water Resources-Indian Scenario  Water Sources- Surface & Ground Water Sources  Uses & overuses of water resources  problems due to Overexploitation of Water Resources
  14. 14. (BEST REFERENCE: Basics of Environmental studies; B.R. Shah, Snehal Popli; Mahajan Publishing House)  Water Resources-Indian Scenario  Water Sources- Surface & Ground Water Sources  Uses & overuses of water resources  problems due to Overexploitation of Water Resources
  15. 15.  Forest Resources - Indian Scenario  Importance of forests- Ecologically & Economically  Forest Types  Deforestations-Causes and effects  Forest Degradation in India
  16. 16.  Forest Resources - Indian Scenario  Importance of forests- Ecologically & Economically ◦ Ecological importance  Regulation of global climate and temperature  Reduction of Global Warming  Production of Oxygen  Conservation of Soil  Improvement in fertility of soil  Control of water flow  Habitat to wildlife  Absorption of Noise  Absorption of air pollution
  17. 17. ◦ Economical importance / Uses of forest products  Timber  Fuel food  Raw material for wood based industries  Bamboo  Food  Miscellaneous products
  18. 18.  Forest Types ◦ Tropical Rain forest – (rain whole year) [Tropical = Near Equator] ◦ Tropical Deciduous forest – (rain only in monsoon) ◦ Tropical Shrub Forest – (longer dry season less rain) ◦ Temperate Deciduous forest – (Moderate temperature & rainfall throughout the year) ◦ Evergreen Coniferous forest (Boreal forests)
  19. 19.  Deforestations-Causes and effects ◦ Deforestation  “The permanent destruction of forests and woodlands is termed as deforestation.” ◦ Desertification  “Desertification is a type of land degradation in which a relatively dry land region becomes increasingly arid, typically losing its bodies of water as well as vegetation and wildlife.”  It is caused by a variety of factors, such as climate change, deforestation and other human activities.  Desertification is a significant global ecological and environmental problems.
  20. 20. ◦ Afforestation  “Planting and maintaining trees on areas that were not covered with forest.” ◦ Causes of Deforestation  Population Explosion  Shifting Cultivation – (using forest land for agricultural purpose)  Growing food demand  Fire wood  Raw material for wood based industry  Infrastructure Development  Forest fires
  21. 21. ◦ Effects of Deforestation/Problems created by deforestation  Soil Erosion  Expansion of Deserts  Decrease in rainfall  Loss of Fertile land  Effect on climate  Lowering of water table  Economic losses  Losses of flora and fauna  Losses of Bio-diversity  Loss of medicinal plants  Environmental Changes  Change in living habits
  22. 22. ◦Forest Degradation in India  As mention in Deforestation
  23. 23.  Non-Conventional/Renewable Energy Sources  Conventional/Non-Renewable energy sources  Problems due to overexploitation/overuse of Energy Resources
  24. 24. Non-Conventional Conventional Newly established Used from long time ago Renewable Non-Renewable Non-exhaustible Exhaustible Advantages  Wide availability  Decentralized power production  Available for the foreseeable future  Lower running cost  Low pollution  Available in highly concentrated form  Easy to store  Reliable supply  Lower initial cost Disadvantages/Limitations  Unreliable supply  Very difficult to store  Usually produce in small quantities  High initial cost  Limited supply  Highly polluting  Available only in few places  High running cost Environmental impact  Less pollution  Ecologically safe for extent  High pollution  Global warming  Ecological problems
  25. 25.  Non-Conventional/Renewable Energy Sources ◦ Solar Energy  “Energy coming from sun in the form of heat radiation”  Application  Solar water heating  Solar Drying of agricultural and animal products  Solar Distillation  Solar cookers  Solar Engines for water pumping  Solar furnaces  Solar photovoltaic cells  Solar heating of buildings  Solar green houses
  26. 26.  Advantages  Ease installation and maintenance  No noise, No pollution  Disadvantages/Limitations  Uncertainty of availability  Large space required  Depends on amount of sunlight according to region  Higher initial cost
  27. 27. ◦ Wind Energy – (wind mills) ◦ Tidal Energy  Use of potential difference between high tide and low tide ◦ Hydro Energy - (generally in dams)
  28. 28.  Conventional/Non-Renewable energy sources ◦ Coal, Fossil Fuels – Petroleum  Problems due to overexploitation/overuse of Energy Resources ◦ Extinction of resources ◦ Excessive mining and associated problems ◦ Pollution ◦ Economical Effect
  29. 29. “Love your Environment”, only way to save it

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