it is a presentation on green house effect personally used by me you guyz can also be use it for your presentations.

1. “GREEN HOUSE EFFECT”
Presentation by Group 1
Noor Sohail
Zimna Jabbar
Sadaf Batool

2. Definition of
Green House
Effect:
• Green house effect is a naturally
occurring phenomenon in the earth’s
atmosphere that warms the earth surface
for the existence of life on it.
• Greenhouse Effect, the capacity of certain
gases in the atmosphere to trap heat
emitted from Earth’s surface, thereby
insulating and warming the planet.

3. History of
Green House
Effect:
History of
Green house
effect
The greenhouse effect was
discovered by Joseph Fourier in
1824.
First experimented on by
John Tyndall in 1858.
First reported
quantitatively by Svante
Arrhenius in 1896.

4. • Stratosphere is a thin layer of certain gases about 30 km above the earth surface.
• The green house effect is caused by those gases in that layer.
• Thermal radiation from the sun comes towards the earth and are trapped inside the
earth surface due o those gases.
• As a result the sun light comes towards the earth surface and never leaves back.
• The radiations from the sun are then trapped on the earth resulting in heating of the earth
surface and rise of temperature on the earth.
Mechanism Of Green House Effect:

5. Diagram
representation
of green
house effect
incoming
radiation
infrared radiation
greenhouse
gases

6. • Greenhouse gases are the gases present in
the atmosphere which reduce the loss of heat
into space and therefore contribute to global
temperatures & provide us with green house
effect.
• Greenhouse gases are essential to
maintaining the temperature of the earth.
• Green house gases play an important role
in keeping the earth warm. They do it by
making a layer of gases on the earth
surface and absorbing the heat from the
sun.
Green House
gases
History of
Green House
Effect:
Green House
gases

7. Contribution
of Green
house gases:
By their percentage contribution to the
greenhouse effect on Earth the four major gases
are
• water vapour, 36–70%
• carbon dioxide, 9–26%
• methane, 4–9%
• ozone, 3–7%
• Nitrous oxide 6%

8. Emissions of Green House gases:
Name of gas Source(s)
Carbon dioxide
(CO2)
From burning coal and oil, and the removal of
plants, volcanic eruptions.
Chlorofluorocarbons
(CFCs)
From air conditioners, refrigerators and aerosols
Methane
(CH4)
From rice growing, animal waste, swamps and
landfills
Ozone
(O3)
From air pollution
Nitrous oxide
(N2O)
From fertilizers and burning of coal and oil

9. • Deforestation
• Use of heavy vehicles that emit green house
gases.
• Burning of wood and coal.
• Burning of fossil fuels
• More urbanization (cities, industries)
• Ozone layer depletion
• Formation of clouds
Green House
gases
History of
Green House
Effect:
What Causes
Green House
effect?

10. Types of
Green house
Effect
• Artificial green house
also known as man-made
green house effect.
• Natural Green house
effect.

11. Green House
gases
History of
Green
House
Effect:
Natural Green
house effect.
• The green house layer over the surface of
the earth that is made by nature is called
natural green house effect.
• That natural green house layer exists over
the surface of the earth from the times
when Earth existed.
• The human activities are only increasing
this green house effect.
• But humans themselves never contributed
in making of this green house layer over
the earth.

12. Artificial
Green house
Effect:
 The green house effect made artificially by
humans on small level is called artificial green
house effect.
 An artificial green house effect is made making
a small house called a green house, under
which we can trap sunlight and increase the
temperature.
 A green house is artificially made to gain
personal benefits e.g. for the better growth of
plants.
 Plants grown in an artificial green house show
better and earlier growth.

13. Figure representation of an artificial green house
effect

14. Green House
gases
Advantages of
green house
effect
• Existence of life
• Maintaining Earth’s temperature
• Filter unwanted solar energy
• Help in growing offseason crops
• Solar powered water heater use the
greenhouse effect to heat water
• Maintains the water level & restricts ice
melting

15. Disadvantages
of Green house
Effect:
• Global warming
• Sea level rise
• Economic impact
• Agricultural impact
• Effects on aquatic systems
• Effects on hydrological cycles
• Health
• Direct effects of temperature
rise
• Spread of disease

16. Green House
gases
History of
Green
House
Effect:
What would
happen if
there will be
no green
house effect?
• If there were no greenhouse gases at
all, the average temperature of the
earth would have been -18 °C to 18 °C
less than today’s temperature. Due to
this, ice would cover the earth surface
which would make survival of living
organisms impossible.

17. Global
warming
• Increased global warming eventually leads to
global warming.
• Rise in the temperature of the earth surface
is called global warming.
• It is the long term heating of the earth’s climate
system observed since the pre-industrial period.
• Human activity is adding more gases to the
naturally occurring layer of greenhouse gases.
This thickens it so it cannot let as much heat
return to space and so the temperature of the
earth gradually increases.