Global warming :A global concern               BY :-Govind Manglani               Email :               govindmanglani@red...
 Is the world getting warmer? If so, are the actions of  mankind to blame for earth’s  temperature increases? What can/...
   Global warming or climate change is the    gradual increase of the average temperature    of the Earth   The average ...
 Earth   formed ~4.6 billion years  ago Originally very hot Sun’s energy output only 70%  of present Liquid water pres...
   Life appeared ~3.8 billion years ago   Photosynthesis began 3.5-2.5 billion years ago    ◦ Produced oxygen and remove...
SolarSun     Energy      Solar      Energy
SunSolar    Radiation          CoolingEnergy
SunSolar         RadiationEnergy    Cooling
Sun Solar         RadiationEnergy    Cooling
1.   Nitrogen -                79%2.   Oxygen-                   20%3.   Other gases     (methane,carbondioxide,   carb   ...
   Carbon dioxide (CO2)   Methane (CH4)                Natural   Nitrous oxide (N2O)   Hydro fluorocarbons (HFCs)   P...
Rising levels of greenhouse gases
8Carbon (109 metric tons)                                  Total                           7      Liquid fuel             ...
Estimated carbon emitted     per yearAtmospheric CO2 has increased 26%since the industrial revolution, largelydue to fossi...
8Carbon (109 metric tons)                               Annual carbon emissions                               Atmospheric ...
Fuel combustion
   Increasing CO2 emissions, especially in China    and developing countries   Likely to double within 150 years:    ◦ I...
   Water levels will rise in oceans   The timing of the seasons will change   Increased spread of disease   Stronger h...
Forests                                    BiodiversityImpact of rise intemperature of 1.8oC to4oC                        ...
Flat                          0.8                          0.6D Mean Temperature (°C)                          0.4        ...
   Rajasthan- Drought   Rann of Kutch – sea    level rise   Mumbai-Salt water    intrusion   Kerala –Productivity    o...
MELTING OF ICE                 Which                  adversely                 Effect                 the life of        ...
   Use fluorescent lighting in your home   Drive a hybrid car   Use alternative energy sources for electricity    and h...
 The impacts of climate change are not evenly distributed – the poorest countries and people will suffer earliest and mos...
Global warming ..global concern : govind
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Global warming ..global concern : govind

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Global warming ..global concern : govind

  1. 1. Global warming :A global concern BY :-Govind Manglani Email : govindmanglani@rediffmail.co m
  2. 2.  Is the world getting warmer? If so, are the actions of mankind to blame for earth’s temperature increases? What can/should be done about these issues?
  3. 3.  Global warming or climate change is the gradual increase of the average temperature of the Earth The average temperature of the Earths surface is around 59˚F or 13 ˚C. Greenhouse Gases in the atmosphere hold in heat Without these gases, the Earth’s surface temperature would drop to around 0 ˚F
  4. 4.  Earth formed ~4.6 billion years ago Originally very hot Sun’s energy output only 70% of present Liquid water present ~4.3 billion years
  5. 5.  Life appeared ~3.8 billion years ago Photosynthesis began 3.5-2.5 billion years ago ◦ Produced oxygen and removed carbon dioxide and methane (greenhouse gases) ◦ Earth went through periods of cooling (“Snowball Earth”) and warming Earth began cycles of glacial and interglacial periods ~3 million years ago
  6. 6. SolarSun Energy Solar Energy
  7. 7. SunSolar Radiation CoolingEnergy
  8. 8. SunSolar RadiationEnergy Cooling
  9. 9. Sun Solar RadiationEnergy Cooling
  10. 10. 1. Nitrogen - 79%2. Oxygen- 20%3. Other gases (methane,carbondioxide, carb onmonoxide, 1% NO-x , So-x)
  11. 11.  Carbon dioxide (CO2) Methane (CH4) Natural Nitrous oxide (N2O) Hydro fluorocarbons (HFCs) Per fluorocarbons (PFCs) Manmade Sulphur hexafluoride (SF6)
  12. 12. Rising levels of greenhouse gases
  13. 13. 8Carbon (109 metric tons) Total 7 Liquid fuel 6 Solid fuel Gas fuel 5 4 3 2 1 0 1750 1800 1850 1900 1950 2000 Year
  14. 14. Estimated carbon emitted per yearAtmospheric CO2 has increased 26%since the industrial revolution, largelydue to fossil fuel combustion anddeforestation. The annual increase inCO2 can be estimatedfrom emissionsM=4x∏xr2P/g= 55.2538 x 1018 kg.
  15. 15. 8Carbon (109 metric tons) Annual carbon emissions Atmospheric CO2 6 Atmospheric CO2 average 4 2 0 1955 1965 1975 1985 1995 2005 Year
  16. 16. Fuel combustion
  17. 17.  Increasing CO2 emissions, especially in China and developing countries Likely to double within 150 years: ◦ Increased coal usage ◦ Increased natural gas usage ◦ Decreased petroleum usage (increased cost and decreasing supply)
  18. 18.  Water levels will rise in oceans The timing of the seasons will change Increased spread of disease Stronger hurricanes and storms Animals change behavior
  19. 19. Forests BiodiversityImpact of rise intemperature of 1.8oC to4oC Agriculture Coastlines
  20. 20. Flat 0.8 0.6D Mean Temperature (°C) 0.4 Decreasing Flat 0.2 0.0 -0.2 -0.4 -0.6 1880 1900 1920 1940 1960 1980 2000 Year
  21. 21.  Rajasthan- Drought Rann of Kutch – sea level rise Mumbai-Salt water intrusion Kerala –Productivity of Forest Tamil Nadu-Coral bleaching
  22. 22. MELTING OF ICE Which adversely Effect the life of endangered species
  23. 23.  Use fluorescent lighting in your home Drive a hybrid car Use alternative energy sources for electricity and heat Green roofs
  24. 24.  The impacts of climate change are not evenly distributed – the poorest countries and people will suffer earliest and most. And if and when the damages appear it will be too late to reverse the process. Thus we are forced to look a long way ahead.

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