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Chap 3 environment
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Chap 3 environment

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  • 1. 3.1.3 : Natur alDisaster
  • 2. Floods  Can cause erosion and landslides  Destroy crops, livestocks, properties and spreads disease
  • 3. Drought Land hard and dry Plants will die and will disrupt the food web
  • 4. Volcanic eruption  Choking clouds of dust and poisonous gases  Can cause acid rain and air pollution
  • 5. Earthquakes Destroy building, properties, animals, plants and people Can cause tsunami, hurricanes, typhoons or cyclones.
  • 6. Tsunami
  • 7. Hurricane
  • 8. Typhoons
  • 9. Cyclones
  • 10. 3.2 T he Sour ce ofEnvironmental Pollution
  • 11. Sources ofenvironmentalpollution Uncontrolled used of fossil fuels Disposal of by-products, waste, toxic substance, radioactive substance, smoke and heat from factories Uncontrolled use of chemical fertilizers, pesticides and fungicides in agriculture
  • 12. Sources ofenvironmentalpollution Production of noises, smoke and poisonous gases from vehicles and machinery Disposal of rubbish and sewage Use of chlorofluorocarbon (CFC)
  • 13. Effects ofenvironmentalpollution Human health Loss of habitat and change in natur Extinction of species Loss of economic resources
  • 14. The Greenhouse EffectNatural heating process thatoccurs when certain gases(greenhouse gases) in theEarth’s atmosphere trap heat.
  • 15. Greenhousegases Carbon dioxide – main greenhouse gas which come from the burning of fossils fuels and deforestation Methane, chlorofluorocarbon (CFC), ozone and nitrogen oxides.
  • 16. Global Warming Average global temperature of Earth is rising This could cause extensive melting ice caps and glaciers and raise sea levels It will change weather patterns and effect agricultural output.
  • 17. The Ozone Layer Ozone layer contains a high concentration of ozone and serves to shield living organism from the Sun’s harmful energy Ozone absorbs most of the ultraviolet radiation that enters the atmosphere.
  • 18. Coolant Refrigerators Air-Conditioner CFC’sPropellants Styrofoam Spray cans/ aerosols
  • 19. Effect of OzoneDepletion  Irritation of eyes, throat and lung cancer
  • 20.  Reduce the yield of crops
  • 21.  Sunburn
  • 22.  Skin cancer
  • 23.  Cataract
  • 24.  Mutation - Down’s Syndrome
  • 25.  Impairs crop and tree growth Kill phytoplankton that sustain oceanic life
  • 26. The Idea of Preservation and Conservation of the Environment and Pollution Control Preservation  To keep something the same or prevent it from being damaged. Conservation  Carefully using valuable natural resources that they will be available for as long time as possible
  • 27. The Importance of Proper Management of Natural Resource Forest reserve Develop new technology of fisheries Monitor an opening of a new land Carried out mining activities systematically