3. • The greenhouse effect is a process by
which thermal radiation from a
planetary surface is absorbed by
atmospheric greenhouse gases, and is
re-radiated in all directions. Since part
of this re-radiation is back towards
the surface and the lower atmosphere,
it results in an elevation of the average
surface temperature above what it
would be in the absence of the gases.

4. •
•
•
•
Nitrous Oxide. (N2O)
Water Vapor. (H2O)
Carbon Dioxide. (CO2)
Methane. (CH4)

6. • Natural Green House
Effect is made from the
heat energy radiated from
the sun.
• Sunlight passes through
the atmosphere forming a
cycle.
• The cycle continues as
some of the heat Green
House gases are naturally
present.
• Sunlight passes through
the atmosphere gets
trapped and the leftover

7. • Activities done by man such as
deforestation, etc. result in increment of
Green House Effect.
• Greenhouse Effect also increases by
burning fuels in open.

8. • The greenhouse effect works like an
actual greenhouse, a place to keep
growing plants nice and warm.
• This is the same process that keeps
the Earth and the life on Earth nice
and warm.
• Visible light enters the top of the
Earths atmosphere, some of it is
scattered by air molecules and most
of it is reflected back into space.

9. • When the sun’s rays hit the Earth, 70
% of the energy stays on the planet,
absorbed by land, oceans, plants and
other things and the other 30%
reflects back into outer space by
clouds.
• But the 70% doesn’t stay on the Earth
forever, the things around the planet
that absorb the sun's heat eventually
radiate a portion of that heat back
out at a different wavelength.

10. • This process keeps the Earth in radiative
equilibrium; the suns rays continuously
hitting the Earth warming it, and then the
warm Earth sends back the radiation back
into space cooling itself.
• Some of that released radiation makes it
into space, and the rest of it ends up
getting reflected back down to Earth
when it hits certain things in the
atmosphere, such as carbon dioxide,
methane gas and water vapor -- the car
windows. The heat that doesn't make it
out through Earth's atmosphere keeps
the planet warmer than it is in outer
space, because more energy is coming in
through the atmosphere than is going out.
This is the greenhouse effect that keeps

11. • Rising temperatures cause water of the
oceans along with the sea to increase
• Increasing temperatures melt ice as it
starts to flow into the seas of Antarctica
and Greenland.
• Sea levels rise by 20-40 cm causing
tsunamis and floods in areas with low coast
areas e.g. Bangladesh and Netherland
• Flood in many areas cause danger for living
things

12. • Changes in the weather affect the growing crops around
the world.
• Crops of wheat and rice grow well in high temperatures.
• Sugarcane and maize don’t survive in high temperature and
end up dying.
• Furthermore change in the amount of rainfall affect the
growth leading to scarcity of food.
• South-Eastern part of the world will be

13. • Changes make it hard for humans to adjust
• and adapt to climate.
• Avoiding all the disasters moving from one
place to another will be hard.
• While weather and temperature changes,
the homes of plants and animals will be
affected .
• New homes for animals may not be safe

14. • Countries all over the world will be
affected
• Britain and Southeast will have a risk
of droughts
• Africa won’t have
enough water.

15. • Wasteful buying
- If you don't need or truly want
- something, don't buy it. It's going to end
up in the garbage.
• Turn off the lights when you leave the
room.
- Don't leave your television on while you go
to sleep. Only turn on the water tap when
you need it. For example, turn it off while
you
- are putting toothpaste on the toothbrush.

16. • Increasing in Greenhouse gases will change
weather around the world.
• North-western countries have an increase of
temperature .
• Summers will be hotter and winters would be
cooler
• Some places will become hotter and wetter
while some will be dry and cooler.
• The world will change with droughts,
• storms, floods, etc.

17. • Reduce, reuse and recycle.
- Reduce the things that your needs.
- Reuse items that you, have until they
are good for nothing. Recycle all that is
possible.
• Choose natural gas over coal and oil
every chance you get.
- For example ; when barbecuing.
• Get a hybrid or an electric car when
shopping for that new car.
- If this isn't possible, choose a small car
that gets good gas mileage.

18. • Form an environmental club in your high
school , college or community.
• Walk to places or get there by bike.
- It will improve your health and the health
of your planet.
• Get involved in tree planting projects.