2. Global warming refers to a gradual increase
in the overall temperature of the earth's
atmosphere generally attributed to the
greenhouse effect caused by increased
levels of carbon dioxide, CFCs, and other
pollutants.

3. 1. Since 1971, 90% of the warming has occurred in
the oceans.
2. Since the early 20th century, the global air and sea
surface temperature has increased about 0.8 °C
(1.4 °F).
3. Each of the last three decades has been
successively warmer at the Earth's surface than any
preceding decade since 1850.

4.  Carbon dioxide emissions from fossil fuel burning power
plants.
 Carbon dioxide emissions from burning gasoline for
transportation.
 Methane emissions from animals, agriculture such as rice
paddies, and from Arctic seabeds.
 Deforestation , especially tropical forests for wood, pulp, and
farmland.
 Increase in usage of chemical fertilizers on croplands.

5. 1. Greenhouse is a glass
house for keeping
plants.
2. It absorbs heat but
doesnot radiate it back
to the atmosphere.
3. greenhouse gases plays
the same role.
4. Global warming takes
place when these
greenhouse gases
accumulate in the
atmosphere which
makes the average
temperature on Earth
warmer.

6.  CLIMATIC CHANGES
 PHYSICAL IMPACTS
 SOCIAL IMPACTS
 Ecological changes

7.  Rise in temperature.
 Increase in
humidity .
 Ueven distribution
of rainfall.
 Creation of
lowpressure zone
resulting in storms
& cyclones.

8.  Floods & drought.
 Inrease in sealevel.
 Melting of glaciers &
polar icecaps.
 Submergence of
islands & nearby
coastal areas. Melting of polar icecaps

9.  Crop failure.
 Water scarcity.
 Migration & conflict
for survival for all
living beings
including humans &
cattle.
Picture showing social effects of
global warming

10.  Impact on biological
systems.
 Disturbance of
foodchain & food
web.
 Increase of
endangered species.
 Extinction of species. Polarbears becoming endangerd

11. GRAPH SHOWING RISE IN
CARBONDIOXIDE EMISSIONS & RISE
IN TEMPERATURE

12. Global warming has many adverse effects , so it can be
controlled in the following way :-
Afforestation.
Avoid burning of fossil fuels.
Use alterative sources of energy like wind , tidal etc .