Global Warming ppt

 GLOBAL WARMING 

Introduction

  • Global Warming is the increase in average temperature of the earths near surface air and oceans.
  • Most of the observed temperature increase is caused by increase concentration of greenhouse gases. 
  • Major gases

                           water vapour     = 36-70%

          carbon dioxide  = 9-26%

          methane           = 4-9%

          ozone               = 3-7%

Causes of global warming

  • Emission of green house gas like carbon dioxide, methane, nitrous oxide etc.
  • The major source is carbon dioxide (80%).
  • 20% by methane and nitrous oxide .

Carbon dioxide

  • The major source of carbon dioxide is the power plants.
  • Burning of fossil fuels for the purpose of electricity generation .
  • About 20% of carbon dioxide emitted in the atmosphere comes from burning of gasoline in engines of the vehicles. 

Methane

  • Methane is more than 20 times as effectual as carbon dioxide at entrapping heat in the atmosphere.
  • Methane is obtained from resources such as rice paddies, bovine flatulence, bacteria in bogs and fossil fuel manufacture.

Nitrous oxide

                The main sources of nitrous oxide include nylon and nitric acid production, cars with catalytic converters, the use of fertilizers in agriculture and the burning of organic matter. 


Deforestation 

                Cutting and burning of forest for the purpose of residence and industrialization.


Effect of global warming 

  • Increasing the average temperature of the earth.
  • Alterations in the ecology, including an increasing sea level and modifying the quantity and pattern of rainfall.
  • Boost the occurrence and concentration of severe climate events, such as floods, famines, heat waves, tornados, twisters. 

Responses to global warming

  • MITIGATION
  • ADAPTATION
  • GEOENGINEERING
  • UNFCC (United Nations Framework Convention on Climate change)

Reduce global warming 

BY 8 simple steps….
  • Reduce, Reuse, Recycle
  • Use Less Heat and Air conditioning
  • Change a Light Bulb by CFL
  • Drive Less and Drive Smart
  • Buy Energy-Efficient Products
  • Use Less Hot Water
  • Use the “Off” Switch
  • Plant a tree





Comments

  1. Unknown18 March 2022 at 21:47

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  2. Unknown23 March 2022 at 23:01

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    ReplyDelete
  3. Shaurya4 January 2023 at 21:21

    Best solution thanks bro

    ReplyDelete
    Replies
    1. All things17 October 2023 at 17:33

      This comment has been removed by the author.

      Delete

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