PPT on POLLUTION

1. K.VINAYA
11U51A0430

2. Objectives
Man is one of the species who inhabit the earth.he
is the only one who has interfered with various natural
processes for use of both biological & physical resources to
meet his multiple demands,man has polluted all the three realms
of the earth-lithosphere,hydrosphere & atmosphere.it is
essential for us to know about environment & its pollution.
In this presentation we will be able to know about-
•Environment
•Biosphere
•Ecosystem model
•Atmosphere
•Atmospheric pollution
•Primary & secondary pollutants
•Acid rain
•Ozone depletion
•Green house effect
•Noise pollution

3. That which surrounds, the total sum of the
condition of the surroundings within which an
organism, or group, or an object,exists(including
the natural as modified by human activity & the
artificial).

4. Atmosphere
Sea
Abiotic Environment
Biotic Environment

5. tmosphere
Hydrosphere Lithosphere
Biosphere
The entire part of
earth's land, soil,
water & atmosphere in
which living organism
are found is called
biosphere
Or
The combined area
lithosphere,
hydrosphere of &
atmosphere is known as
biosphere.
Biosphere Model

6. Source Pollution
Transportation 42%
Fuel 21%
Industries 14%
Solid waste
disposal
05%
Other 18%
42%
21
%
Transpo
rtation
Fue
l
Is an unwanted change in the
quality of earth's earths
atmosphere caused by
emission of gases caused by
emission of gases due to
burning of fossil
fuel,transportation,industrial
institution etc.
Indus
tries
wast
e
Oth
er
21%
14
%
05
%
18
%

7. Secondary pollutants :These result from chemical reactions
between two or more air components.
Formation of secondary pollutants
2SO2+O2 2SO3
2SO3+H2O H2SO4 (Secondary pollutant)
Natural Pollutants: The pollution which comes out from natural
sources such as forest fires volcanic eruption decomposition of
organic matter & natural radioactivity.
Primary Pollutants: Harmful chemical that directly enters the air
as a result of human activity. These are deforestisation burning of
fossil fuel industrialization warfare etc.

8. Primary Pollutants Secondary Pollutants
Factory
Volcano
NO2,SO3,HNO3,
H2SO4,H2O2,O3,
PANs,MostNO3
-- & SO4
-2
CO,CO2,NO,Most
Hydrocarbons,
Most SPM
Solar radiation

9. Environmental challenges
• Green house effect: Increasing global temperature.
Scientists predicting that earth's temperature will increase
by 3-40C by year 2030 if the pollution continues to increase
at the same pace.
• Ozone depletion: As ozone layer in the upper atmosphere
absorbs incoming harmful ultraviolet radiation but it is now
getting thinner & more UVs are reaching in to earth creating
different disease like cancer& eye problems.
• Photochemical smog: In 1952 London was covered by smog
for 10 days .This smog was caused by fog, smoke, ash,&
SO2 plus NO2.Sunlight played a great role in the formation
of this smog .Though deaths occurring at that time were not
directly attributed to the smog later statistics confirmed
that 6,000 more people.
Acid rain: is caused by oxides of nitrogen & sulphur.It increases
acidity of soil & effects the growth of trees & plants. The majestic
monument Taj Mahal in India is also affecting by this.

10. Acid Rain
SO2 &
NOX
+water
SEASea
LakeFactories,
Transportation
Solar Radiation
H2SO4 (Sulphuric Acid)
HNO3 (Nitric Acid)

11. Ultraviolet rays
from Sun
The Ozone layer in
stratosphere
blocks these
harmful UV rays
Chlorofluorocarbons
are entering in to
atmosphere releasing
chlorine. The chlorine
than break down the
ozone
The chlorine released from CFCs break
down the ozone molecule.
chlorine
ozone
More ultraviolet radiations are reaching in to earths
surface as there is a whole in ozone layer.
Oxygen
Whole in
Ozone layer

12. Space vehicle launch
Loudspeaker
Jet take off
Very High above than
100db
Loud Conversation
Heavy Traffic
High Approximate 80db
Quit Conversation
Ticking Clock
Pleasant below than
80dB
Quit RainingSports car

13. Conclusion
We know that certain environmental conditions like air,water,& food are
essential for man,s survival.apart from their availability their quality &
quantity must be assured according to man,s natural & acquired capacity
for sustenance progress in industrialization has brought environmental
hazards such as air water & noise pollution.These have caused many
health problems & diseases.

14. THANK YOU