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,)
โข Combustion of
gasoline in
Automobiles
โข Gasoline , Coal,
Gas Industry
โข Decrease visibility
due to yellowish
nature of NO2
โข Eye irritation
โข NO2 responsible
for suppressing
growth of plants
โข Prolong exposure
to Nitrogen
Dioxide increases
respiratory
infection
โข May increase the
cases of cancer
โข 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
)
โข Formed From
Photolysis of
NO2
โข Harsh Odour
โข Bronchial
constriction
โข Coughing and
Wheezing
โข Damage Plastics
โข Retard Plant Growth
โข Decrease yield of
crop
โข People with
asthma and
respiratory
problems
mostly
affected by
it.Itโs 0.1 PPM
concentration
can reduce
half of total
photosynthesi
s
18. Peroxy acyl
nitrate(PAN)
,and other
related
compounds
โข Formed
by
reaction
of NO2
with
VOCs
โข Eye and
respirato
ry
irritation
โข Cause
damage
to
proteins
โข 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+O2โ2NO
2NO+O2โ2NO2
2-6 Hr
6-12 hr
28. i. Try to use the vehicles at minimal level and check the engineโs 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.