Main pollutant from automobile exhaust is
CO
CO2
NO
Hydrocarbons
Pollutants released from iron and steel industry are
CO2, NO2, H2S
CO, CO2, SO2
CO2, SO2, NO2
CO2, NO, SO2
Ultraviolet radiation is absorbed by
exosphere
ionosphere
mesosphere
stratosphere
Ozone depletion in the stratosphere is mainly caused by
SO2
NO2
Chlorofluorocarbons
The lowest layer of earth's atmosphere is
troposphere
BHC and DDT act as
carcinogens
allergens
asthematic agents
all of these
Lead population is mainly caused by
sewage
insecticide
leaded gasoline
None of these
Global warming may result in
flood
cyclone
decrease in forest productivity
all of the above
Lead in water can cause
arthritis
hair falling
kidney damage
All of these
Ozone in stratosphere is depleted by
C6F6
C6H6Cl6
CF2Cl2
C7F16
