Dear educators / Students, You can view and download this PPt for your education purposes. 'Think Innovative' Kohila

2. Createdby,
M.Kohila,M.Phil.(Tam),B.A(Eng),
Secondarygrade 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. •The glass panels of the
greenhouse let in light but keep
heat from escaping.
•This causes the greenhouse to
heat up.
Green house
•Greenhouses are used to
grow plants, especially in the
winter.
•Greenhouses work by
trapping heat from the sun

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

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

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

16. Flood

17. Drought

19. In 1999
In 2004
Coastal erosion
Dying coral reefs

20. Tornado Melting of mountain Glaciers

21. Arctic continent ice melts

22. Antartica ice continent melts

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

24. In 1859 In 2001

25. In 1928
In 2004

26. In 1985 In 2002

28. 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

29. Poster on Global warming is issued to
school students