Greenhouse effect<br />
Objectives<br />After this lesson, students should be able to:<br />Define the term greenhouse effect.<br />Explain the me...
Introduction<br />
Introduction to Greenhouse effect<br />What happens to a car that has been sitting in the sun on a hot day with all its wi...
What is “Greenhouse effect”?<br />
What is “Greenhouse effect”?<br />The Greenhouse effect is caused by an atmosphere containing gases that absorb and emit i...
Mechanisms of Greenhouse effect<br />Sunlight brings energy into the climate system; most of it is absorbed by the oceans ...
Mechanisms of Greenhouse effect<br />Some of the infrared energy further warms the Earth.<br />Some of the infrared energy...
Global warming<br />
Mechanisms of Amplified Greenhouse effect<br />AMPLIFIED GREENHOUSE EFFECT:<br />Higher concentrations of CO2 and other "g...
Greenhouse gases<br />Major greenhouse gases are:<br />Water vapour<br />Carbon dioxide<br />Methane <br />Nitrous oxide<b...
Causes of Global Warming<br />These are the major causes of global warming:<br />Volcanic eruption<br />Solar and orbital ...
Problems caused by global warming<br />Increase in global temperature.<br />Melting of ice in Polar Regions.<br />Rising o...
Solutions to prevent global warming<br />Use of Renewable energy.<br />Wind<br />Hydroelectric<br />Waves<br />Solar<br />...
SUMMARY<br />Definition of “Greenhouse effect”. <br />Simple description of the mechanisms. <br />Increase in Greenhouse g...
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Global warming: mechanisms, greenhouse gases, solutions to global warming

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  1. 1. Greenhouse effect<br />
  2. 2. Objectives<br />After this lesson, students should be able to:<br />Define the term greenhouse effect.<br />Explain the mechanisms of greenhouse effect.<br />Explain what are the effects of global warming on Earth and its inhabitant.<br />State and discuss the problems that would be brought up by global warming.<br />Discuss the solutions to prevent global warming.<br />
  3. 3. Introduction<br />
  4. 4. Introduction to Greenhouse effect<br />What happens to a car that has been sitting in the sun on a hot day with all its windows rolled up?<br />
  5. 5.
  6. 6. What is “Greenhouse effect”?<br />
  7. 7. What is “Greenhouse effect”?<br />The Greenhouse effect is caused by an atmosphere containing gases that absorb and emit infrared radiation. <br /><ul><li> Greenhouse gases trap heat within the surface-troposphere system, causing heating at the surface of the Earth.</li></li></ul><li>Mechanisms of Greenhouse effect<br />
  8. 8. Mechanisms of Greenhouse effect<br />Sunlight brings energy into the climate system; most of it is absorbed by the oceans and land.<br />1<br />THE GREENHOUSE EFFECT:<br />Heat (infrared energy) radiates outward from the warmed surface of the Earth.<br />Some of the infrared energy is absorbed by greenhouse gases in the atmosphere, which re-emit the energy in all directions.<br />2<br />3<br />
  9. 9. Mechanisms of Greenhouse effect<br />Some of the infrared energy further warms the Earth.<br />Some of the infrared energy is emitted into space.<br />4<br />5<br />
  10. 10. Global warming<br />
  11. 11. Mechanisms of Amplified Greenhouse effect<br />AMPLIFIED GREENHOUSE EFFECT:<br />Higher concentrations of CO2 and other "greenhouse" gases trap more infrared energy in the atmosphere than occurs naturally. The additional heat further warms the atmosphere and Earth’s surface.<br />Sunlight brings energy into the climate system; most of it is absorbed by the oceans and land.<br />6<br />1<br />
  12. 12. Greenhouse gases<br />Major greenhouse gases are:<br />Water vapour<br />Carbon dioxide<br />Methane <br />Nitrous oxide<br />Ozone<br />Chloroflurocarbon (CFC)<br />
  13. 13. Causes of Global Warming<br />These are the major causes of global warming:<br />Volcanic eruption<br />Solar and orbital variations.<br />Human activities (due to the increasing human population)<br />Burning of fossil fuel.<br />Clearing of rainforest.<br />
  14. 14. Problems caused by global warming<br />Increase in global temperature.<br />Melting of ice in Polar Regions.<br />Rising of sea level.<br />Increase in extreme weather events.<br />Mass extinction of flora and fauna species.<br />
  15. 15.
  16. 16.
  17. 17. Solutions to prevent global warming<br />Use of Renewable energy.<br />Wind<br />Hydroelectric<br />Waves<br />Solar<br />Thermal<br />Use of Nuclear to generate energy.<br />Reforestation.<br />Conservation of energy.<br />
  18. 18. SUMMARY<br />Definition of “Greenhouse effect”. <br />Simple description of the mechanisms. <br />Increase in Greenhouse gases results in Global Warming. <br />Solutions to halt the increase in greenhouse gases. <br />
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