13. Smog can irritate and inflame pulmonary
membranes,
causing chest pains, coughing, and throat irritation.
Other illnesses such as colds and pneumonia
can also be brought on by exposure to smog.
People with asthma problems are under
an even greater threat. Even minor
exposure to smog may cause these people
to get asthma attacks.
Smog slowly ruins people's lungs to an
extent as great as that of cigarettes.
15. CHEMICAL SPECIES ANTHROPOGENIC
SOURCES
ENVIRONMENTAL
HEALTH & EFFECTS
COMMENTS
Nitrogen Oxides
(NO2,NO,)
• Combustion of
gasoline in
Automobiles
• Gasoline , Coal,
Gas Industry
• Decrease visibility
due to yellowish
nature of NO2
• Eye irritation
• NO2 responsible
for suppressing
growth of plants
• Prolong exposure
to Nitrogen
Dioxide increases
respiratory
infection
• May increase the
cases of cancer
• Only 5% of
the total
concentratio
n of NO2
results From
combustion
and most is
formed from
reaction
involving NO
from
lightening,
Bacterial
action in soil.
16. Volatile Organic
compound(VOC
s)
Evaporation of
solvents
Incomplete
combustion of fossil
fuel
Evaporation of fuels
Eye irritation
Respiratory
irritation
Decreased
visibility due
to Blue-
brown haze
VOCs in the
atmosphere
includes naturally
occurring
compounds such
as Terpenes from
vegetation
17. Ozone(O3
)
• Formed From
Photolysis of
NO2
• Harsh Odour
• Bronchial
constriction
• Coughing and
Wheezing
• Damage Plastics
• Retard Plant Growth
• Decrease yield of
crop
• People with
asthma and
respiratory
problems
mostly
affected by
it.It’s 0.1 PPM
concentration
can reduce
half of total
photosynthesi
s
18. Peroxy acyl
nitrate(PAN)
,and other
related
compounds
• Formed
by
reaction
of NO2
with
VOCs
• Eye and
respirato
ry
irritation
• Cause
damage
to
proteins
• Was not
detected
until
recognized
in
smog,Cause
more
damage to
plants than
ozone
21. Pollutants are rinsed out
of the atmosphere with
rainfall
Photochemical Smog can
be blown away by wind
Temperature Inversion
increases photochemical
smog
Role of Topography
in smog formation
24. Free Radical Trap
Free Radical
Traps
When Sprayed in the
atmosphere
Produce
Free
radical
Combine with
free radical
O*,R*,RO*
radicals
Free radical traps slows
down the reaction
N2+O2→2NO
2NO+O2→2NO2
2-6 Hr
6-12 hr
28. i. Try to use the vehicles at minimal level and check the engine’s smoke emission
frequently
ii. Prevent high usage of coals,which result in heavy smog
iii. Reduction of fumes from metal-working and other industrial plants;
iv. Buy green electricity-produced by low-or even zero-pollution facilities.
v. Reduce pesticide use.
vi. Consumers can reduce VOC emissions by avoiding paints with
labels that clearly indicate VOC limits are high. Switching to
water-based paint is also useful.
