The document explains the greenhouse effect, which warms the Earth by trapping heat through greenhouse gases like water vapor, carbon dioxide, methane, nitrous oxide, ozone, and chlorofluorocarbons. It details how these gases are produced both naturally and by human activities, affecting the natural carbon cycle and contributing to increased global temperatures. Key points include the effect of increased water vapor due to rising temperatures and the detrimental impact of chlorofluorocarbons on the ozone layer.

1. The Green House
Effect
Presented By:-
Yamawanti Sharma
Stream:- ETCE
Semester:- 3rd
Roll N0. :- 02

2. Content:-
• Greenhouse Effect: How it works
• Greenhouse Gases
• Water Vapor
• Carbon Dioxide
• Methane
• Nitrous Oxide
• Ozone
• CFCs

3. Greenhouse Effect:
How it works
If it were not for greenhouse gases trapping heat in
the atmosphere, the Earth would be a very cold place.
Greenhouse gases keep the Earth warm through a
process called the greenhouse effect.
• The Earth gets energy from the sun.
• Earth absorbs some of this energy
• and heats up.
• The Earth cools down by giving off
• infrared radiation.
• Greenhouse gases absorb some of
• the radiation before it can escape
• and this warms up the atmosphere.

4. Greenhouse Gases:-
Greenhouse gases absorb this energy, thereby
allowing less heat to escape back to space, and
'trapping' it in the lower atmosphere. Some
greenhouse gasses are natural, while others are
man-made.
1. Water Vapor (H2O)
2. Carbon Dioxide (CO2)
3. Methane (NH4)
4. Nitrous Oxide (N2O)Ozone (O3)
5. Chlorofluorocarbons(CFCs)

5. Water Vapour:-
• Water Vapor is the most
abundant greenhouse gas in the
atmosphere.
• As the temperature of the
atmosphere rises, more water
is evaporated from Earth. The
air is able to 'hold' more
water when it's warmer, leading
to more water vapor in
the atmosphere.

6. Carbon Dioxide:-
Carbon Dioxide is produced
naturally in the our atmosphere.
• However, humankind
has altered the natural carbon
cycle by burning coal,
oil, natural gas and wood.
• Carbon dioxide was the first
greenhouse gas demonstrated to
be increasing in atmospheric
concentration.

7. Methane:-
Methane (CH4) is an extremely effective absorber of radiation.
Methane has both natural and human sources of production.

8. Nitrous Oxide:-
It is produced by
microbial processes in soil
and water, including those
reactions which occur in
fertilizer containing
nitrogen.

9. Ozone:-
Existing in a broad band,
commonly called the 'ozone
layer', a small fraction of
this ozone naturally
descends to the surface of
the Earth. However, during
the 20th century, this
tropospheric ozone has been
supplemented by ozone
created by human processes.

10. CFCs:-
• They destroy good ozone in
the stratosphere.
• Their long atmospheric lifetimes determine
that some concentration of the CFCs
will remain in the atmosphere for over 100
years.
• Chlorofluorocarbons (CFCs) have no
natural source, but were entirely synthesized
for such diverse uses as refrigerants, aerosol
propellants and cleaning solvents.