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Global warming and it's impact

Global warming and it's impact. Created by , M.Kohila,M.Phil .(Tam),B.A(Eng), Secondary grade teacher , S.M.R.V.H.S.S., Vadasery , Nagercoil , Kanyakumary district, TAMILNADU-629001. Teaching objectives. To understand about the green house gases.

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Global warming and it's impact

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  1. Global warming and it's impact

  2. Created by, M.Kohila,M.Phil.(Tam),B.A(Eng), Secondary grade teacher, S.M.R.V.H.S.S., Vadasery, Nagercoil, Kanyakumary district, TAMILNADU-629001

  3. Teaching objectives • To understand about the green house gases. • To undertstand about the infrared radiations. • To understand about the air pollution. • To understand about the green house effect. • To understand about the global warming. • To understand about the effects of global warming.

  4. Green house • Greenhouses are used to grow plants, especially in the winter. • Greenhouses work by trapping heat from the sun • The glass panels of the greenhouse let in light but keep heat from escaping. • This causes the greenhouse to heat up.

  5. Green house gases Any gas that absorbs infra-red radiation in the atmosphere. water vapour Nitrous oxide (N2O) O O C C O O Halogenated Chlorofluoro carbons (HCFCs) Carbon dioxide (CO2) methane (CH4) Ozone (O3) Hydrofluorocarbons (HFCs).

  6. Green house effect Carbondioxide present in the atmosphere absorbs infrared radiations reflected from the surface of the earth and heats up the atmosphere. This heating up of atmosphere by carbondioxide in the air is called green house effect.

  7. Sources of green house gases

  8. Smoke comes out from the factories

  9. Greenhouse gases in the atmosphere behave much like the glass panes in a greenhouse.

  10. Importance of the greenhouse effect Without the greenhouse effect, the Earth would not be warm enough for humans to live. But if the greenhouse effect becomes stronger, it could make the Earth warmer than usual.

  11. Global warming Because of Green house effect the average temperature of the earth increases and this is known as Global warming

  12. Sunlight enters the Earth's atmosphere, passing through the blanket of greenhouse gases.

  13. Sunlight’s energy emains trapped in the atmosphere

  14. Impacts of global warming

  15. Impacts of global warming • Droughts • Floods • Level Rising temperatures of oceans and the sea • Tornadoes • Hurricanes • The melting of mountain glaciers • The reduction of snow cover • Dying coral reefs • Coastal erosion • Loss of coastal ecosystems • Extra warming may cause problems for humans, plants, and animals.

  16. Flood

  17. Drought

  18. Level Rising of oceans and the sea Hurricanes

  19. Coastal erosion In 1999 Dying coral reefs In 2004

  20. Tornado Melting of mountain Glaciers

  21. Arctic continent ice melts

  22. Antartica ice continent melts

  23. The melting of mountain glaciers Arctic ice belts are melting To view the video of Glacier melting click here

  24. The melting of mountain glaciers In 1859 In 2001

  25. The reduction of snow cover In 1928 In 2004

  26. Extra warming may cause problems for plants In 2002 In 1985

  27. Speech on Global warming and its impacts (24-06-2008) Dr.Santhanakumar,District co-ordinater,National Green corps,Kanyakumary district To view this video Click here

  28. Poster on Global warming is issued to school students

  29. The End Thank you

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