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Global Warming Presentation(www.bioguruindia.com)

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Global Warming Presentation(www.bioguruindia.com) Presentation Transcript

  • 1. GLOBAL WARMING AND CLIMATE CHANGE Susheel Dwivedi School of Biotechnology B H U Varanasi                                      
  • 2. What is Global Warming?
    • Global warming results from an increased greenhouse effect i n the atmosphere. You can picture it as a blanket of gases that wraps around the Earth and holds the heat in.
    • Carbon dioxide is the most common gas that causes global warming.
    • As global temperatures increase, the climate changes .
  • 3.  
  • 4.  
  • 5. What is the Greenhouse Effect?
    • Certain gasses in the atmosphere absorb heat energy and reduce the amount that escapes into space
    • This ‘trapping’ of heat from our only source of warmth – the Sun – by the atmosphere is known as the ‘Greenhouse Effect’
    • This gives us a global average temperature of +15 °C rather than -18°C if we had no Greenhouse Effect
  • 6. Important Facts
    • Water vapour is the most important greenhouse gas - ~ 60 - 98% of the greenhouse effect is due to water vapour in the atmosphere (jury still out)
    • CO 2 and other minor gasses account for the remainder
  • 7.  
  • 8. “… There is new and stronger evidence that most of the warming observed over the last 50 years is attributable to human activities.” --Intergovernmental Panel on Climate Change, 2001
  • 9. Painting by Charles Shaw
  • 10.  
  • 11.  
  • 12. Watt’s Steam Engine
  • 13. Internal Combustion Engine
  • 14.  
  • 15.  
  • 16. What Causes Global Warming?
  • 17. Myths about global warming
    • It is not caused by a hole in the ozone layer.
    • It is not caused by poisonous gases.
    • It does not mean that we are running out of oxygen.
    • It is not too late to do something about it.
  • 18.
    • If The atmosphere did not absorb incoming heat, we would roast all day and freeze-dry at night and end up like a sun-dried tomato
      • Mercury - + 427 to – 172 ºC
      • Mars - temperate zone soil
      • + 27 to – 80 ºC
      • Moon - + 107 to 153 ºC
    What If?
  • 19. 1938 1991
  • 20. Wild Fires
  • 21. Drought and water shortages
  • 22. Effects on wildlife
  • 23. Solutions
    • Use less energy
    • Use different sources of energy
  • 24. Energy efficiency and conservation
  • 25.  
  • 26. Hydroelectric dams generate about 10% of our nation’s energy
  • 27.  
  • 28.  
  • 29. CSP
    • Concentrating
    • Solar
    • Power
  • 30.  
  • 31.
    • Albert Einstein said: " If you succeed in using the nuclear-physical findings for peaceful purposes, it will open the way to a new paradise".
  • 32. ! ! Thank you