Wellgw011

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Wellgw011

  1. 1. Global warming refers to the increase of the earth's average surface temperature, due to a build-up of greenhouse gases in the atmosphere. What is global warming?
  2. 2.  Deforestation  Greenhouse gases  Aerosols and soot  Industries  Vehicles  Solar variation
  3. 3. In 200 years, we will have released in the atmosphere, the carbon that took nature 600 million years to trap 1850 1900 1950 2000 CO2
  4. 4. Have occurred in the past 20 years 13 of the hottest year ever recorded
  5. 5. CO2 CO2 CO2
  6. 6. every hour 3 Species go extinct
  7. 7. 2005100005 000 bef. JC10 000 bef. JC 5 million 250 million in 1 1 billion in 1800 3 billion in 1960 4 billion in 1975 5 billion in 1987 2 billion in 1930 9.5 billion in 2010 The world population is increasing
  8. 8. How many Earths do we need ?
  9. 9. Environmentaland Human Effects
  10. 10. Direct Temperature Effects Increase in average temperature More extreme heat waves during the summer; Less extreme cold spells during the winter Harmful to those with heart problems, asthma, the elderly, the very young and the homeless
  11. 11. Climate-sensitivediseases • Increase the risk of some infectious diseases – [particularly that appear in warm areas; are spread by mosquitoes and other insects] – E.g. Malaria, dengue fever, yellow fever, encephalitis Diseases (e.g. cholera) accompanying algal blooms become more frequent
  12. 12. Air Quality An increase in the concentration of ground-level ozone Damage lung tissue Harmful for those with asthma and other chronic lung diseases
  13. 13. Food supply Rising temperatures and variable precipitation Decrease the production of staple foods in many of the poorest regions Increasing risks of malnutrition
  14. 14. Population displacement Rising sea levels Increase the risk of coastal flooding (population displacement) • More than half of the world's population now lives within 60km of the sea.
  15. 15. UV Exposure (Australia) • Skin Cancer – an abnormal growth of skin tissues. • Premature aging – make the skin thick, wrinkled, and leathery • Cataracts – No longer have transparent lenses in their eyes
  16. 16. Measures oncontrolling the problem • Government * set some laws to limit the amount of pollutants produced by factories * develop the skills of using renewable fuels, e.g. solar energy, wind energy * encourage the factories to replace fossil fuels by renewable fuels, which would not cause environmental pollution * carry out energy saving scheme → reduce the pollution produced by burning fossil fuels * build more plants → reduce the pollutants e.g. CO2
  17. 17. Measures on controlling the problem • Citizens * reduce the use of plastic bags → as burning plastic emit CH4 *recycle the resources, e.g. plastic * reduce the use of sprays → as CFCs would be emitted out * reduce the use of air-conditioner, which will emit CFCs * use public transportation instead of private cars → reduce the pollutants emitted by cars
  18. 18.  Reduce, Reuse, Recycle  Use the "Off" Switch  Plant a Tree  Buy Energy-Efficient Products  Encourage Others to Conserve OVERALL
  19. 19. If you care about … The future Vote Climate in 2011 Vote only for the politicians who will act to reduce CARBON emissions Otherwise the result will be ...
  20. 20. Now, you know
  21. 21. Thank You for your attention

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