Global warming


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globle warming, couses, effect ,how serious problem is, solution.

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Global warming

  1. 1. Global WarmingAn average increase in thetemperature of theatmosphere near theEarth’s surface and in thetroposphere, which cancontribute to changes inglobal climate patterns
  2. 2. CausesBurning of fossil fuels (Coal/Crude oil) Power plants generate electricity Transportation-----fuels for transports (E.g. LPG, kerosene, fuel oil) Industrial processes (E.g. manufacture of cement, steel, alluminium)
  3. 3. Causes Other greenhouse gases emission Agriculture Forestry Other land uses Waste management
  4. 4. Example : Using natural gas to cookCH4 + 2O2  CO2 + 2H2O
  5. 5. SERIOUS GREENHOUSE EFFECTGreenhouse gases in the atmosphere ↓Some infrared radiation is trapped ↓ Greenhouse effect
  6. 6. increased about 0.6°C since the late19thcenturyincreased to 2°C over the past 25 years
  7. 7. Regions that have temperatures (1-3°C)warmer than the average: United States Most of the EuropeRegions that have temperatures (1-3°C)cooler than the average: Australia
  8. 8. rising at an average rateof 1 - 2 mm/year overthe past 100 years
  9. 9. Increase in average temperatureMore extreme heat waves during the summer; Less extreme cold spells during the winterHarmful to those with heart problems, asthma, the elderly, the very young and the homeless
  10. 10. Heat waves; Cold waves; Storms; Floods andDroughts Global warmingAn increase in the frequency of extreme events More event-related deaths, injuries, infectious diseases, and stress-related disorders
  11. 11. An increase in the concentration of ground-level ozone Damage lung tissueHarmful for those with asthma and other chronic lung diseases
  12. 12. Rising temperatures and variable precipitation Decrease the production of staple foods in many of the poorest regions Increasing risks of malnutrition
  13. 13. Rising sea levels Increase the risk of coastal flooding (Necessitate population displacement)More than half of the worlds population now lives within60km of the sea.Most vulnerable regions: Nile delta in Egypt, the Ganges-Brahmaputra delta in Bangladesh, many small islands, such asthe Maldives, the Marshall Islands and Tuvalu.
  14. 14. 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
  15. 15. * 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
  16. 16. 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
  17. 17. * reduce the use of air-conditioner, which will emit CFCs* use public transportation instead of private cars → reduce the pollutants emitted by cars