This PPT is prepared and presented by Mr. Yaswanth Kishor of 9th std Jawahar Navodaya Vidyalaya, Lepakshi, Ananthpur to the INOVIT-2015 organised by Vellore Institute of Technology, Vellore, Tamilnadu on 24-25 Jan 2015.

1. Ino VIT -2015
SOUTH INDIA LEVEL SCIENCE CONTEST
FOR SCHOOL CHILDREN
VENUE : VIT UNIVERSITY VELLORE
TAMILNADU

2. VENUE: VELLORE INSTITUTE OF TECHNOLOGY

3. • NAME : E.YASWANTH KISHOR
• CLASS : IX
• THEME : GLOBAL WARMING
• INSTITUTIONS : JAWAHAR NAVODAYA VIDYALAYA
LEPAKSHI, ANANTAPUR ,A.P.
515331

4. TOPIC :
GLOBAL WARMING

6. INTRODUCTION
• This project gives us information about the following:
i)what is global warming?
ii)what causes global warming?
iii)what is the relation between green
house gases and global warming?
iv)what are the affects of global warming on living creatures?

7. Global warming ,term denotes the accelerated warming
of the earth’s surface due to arthropogenic (human
activity- related)releases of green house gases due to
industrial activity and deforestration.

8. GLOBAL WARMING
Global warming is the increase of earth’s average
surface temperature due to effect of green house
gases , such as carbon dioxide emissions from
burning fossil fuels or from deforestation ,which trap
heat that would otherwise escape from earth.

9. GLOBAL WARMING
The sun sends out energy in the form of heat , light.
These sun rays get trapped in the atmosphere, and some of the rays
are get reflected into the space.
The rays which gets through atmosphere heats up the earth.
This will cause the earth to heats up.
The green house gases present in the atmosphere like carbon di
oxide ,methane etc.capture the heat present in atmosphere and
causes the earth to heats up.
This is known as global warming.

10. ULTRA VIOLET RAYS
Ultraviolet rays (UV rays)are sent by the sun in the form
of heat and energy ,this UV radiation is reflected in to the
space by ozone layer
But due to increase of green house gases these are
captured by them and this causes heavy heat in the earth.

11. INFRARED RAYS
• These rays also send by the sun in the form of heat and energy and
that is reflected by the ozone layer.
• These rays are less harmful than ULTRAVIOLET RADIATION(UV rays)

12. HOW WILL THE EARTH HEATS UP?
• The atmosphere is made up of mixture of gases.
• The living creatures need atmosphere to live.
• These gases form a blanket ,which traps heat ,these gases
are called “GREEN HOUSE GASES”.
• These gases trap up heat from the atmosphere which causes
the earth to heat.
• This is known as “NATURAL GREEN HOUSE EFFECT”EFFCT”.

13. WHAT ARE GREEN HOUSE GASES?
The gases which trap heat less than 1%of the atmosphere,
they are called green house gases .
They are the a mixture of gas layers ,which keeping us
warmth, by capturing enough heat from the atmosphere.
But now a days due to the increase of these gases we are
facing the problems.

14. WHAT ARE THE GREEN HOUSE GASES
The green house gases are very good at capturing the energy at
wavelengths that other compound miss.
As a result the earth surface is ~33°c warmer than it would be
without an atmosphere.
These green house gases allow short length
waves but absorb long length waves radiation.

15. GREEN HOUSE GASES
Carbon dioxide
combustion of solid waste, fossil fuels (oil, natural gas, and coal), and wood and
wood products
Methane :
production and transport of coal, natural gas, and oil. Methane emissions also
result from the decomposition of organic wastes in municipal solid waste landfills,
and the raising of livestock.
Nitrous oxide
agricultural and industrial activities, as well as during combustion of solid waste
and fossil fuels.
hydro fluorocarbons (HFCs), perfluorocarbons (PFCs), and
sulfur hexafluoride (SF6),

16. WHERE DOES THE GREEN HOUSE GASES COME FROM
• Burning of fossil fuels releases the carbon dioxide( stored in
it million years ago.
• By the using of refrigerators ,the poisonous gases like
chlorofluorocarbons'(CFC),Perflourocarbons(PFC),releases
in to the atmosphere.

17. GREEN HOUSE EFFECT
The green house gases increase in the atmosphere
,and they will react with chloroflouro carbons and
distract the ozone layer causing heavy heat to be to
be captured by the green house gases
This is known as green house effect

18. WHY IS THIS GLOBAL WARMING HAPPENING?
• Due to the increasing level of carbon dioxide (co2)andsome other gases like
carbon monoxide(co),chlorofluorocarbons(cfc)etc.released by anthropogenic
way into the atmosphere .
• Due to the increase level of these gases the heat from the sun is trapped much
by these gases.
• So that the temperature of the earth increases an das well also cause for
climate changes.

19. CONCEQUENCES
The consequence of the global warming not only showing
effect on us but also our future children also get
affected.
They will suffer from so many types of diseases and so
many resource problems.

20. AVERAGE MEAN LEVEL OF TEMPERATURE

21. CAUSES
HYDROFLOURO CARBONS(HFC)
PERFLOUROCARBONS(PFC)
SULPHURHEXA FLOURIDE(SF6)
DUE TO THESE TYPE OF GASES THEY GO AND ACCUMUMLATE IN THE
ATMOSPHERE WHEN THE ULTRAVIOLET RAYS(UV) FALLS ON THE
OZONE LAYER THE CFC’S DEPLETE THE OZONE CAUSING EARTH HEAVY
WARMTH ,AND TO CAUSE GLOBAL WARMING.

22. WHAT ARE CFC’S AND PFC’S
The gases which causes green house effect and as well as
playing main role in depletion of ozone layer.
These gases allow the UV rays from the sun by causing depleting of
ozone
They are formed by using refrigerators ,rockets and jet engines

23. IDENTIFICATION
• The water level will be increase and over flow in to the villages.
• The ice from the Himalayas melts and mix-up in to the oceans.
• Due to the heavy heat glaciers will be formed much.

24. PROBLEMS
Due to the direct falling of uv rays and infra red rays humans
will be affected by i)eye cataracts
ii)skin cancer
Due to the heavy temperature the ice from the Himalayas
melts and water will over flow to the villages and destroy
every thing.
The marine animals get affected by the loss of resources .
The greenery of the world deplenished.

25. Ozone layer will depletes and there will be no living being
on the earth.
An increase in the concentration of green house gases
leads to nan increase in the magnitude of the green house
effect(called enhanced green house effect).
It infects the human’s DNA and immune system.

27. SOLUTIONS
• We must take care of our earth, instead of polluting .
• And we must reduce using of aerosols, refrigerators.
• Burning of fossil fuels is also reduced.
• We must maintain sustainable development.
• We should reduce the use of plastics and other non
decompose materials.

28. SUGGESTIONS
• I will suggest to reduce the use of non renewable resources.
• To reduce the use of CFC’S.
• To reduce the use of fuels like petrol ,diesel and fossil fuels etc.
• To maintain the use of CNG(compressed natural gas) instead of petrol
,diesel etc…
• Then our earth will be sustainable ……