The source of oxides of carbon is/are………….
a) combustion of fossil fuel
b) lightening and decay of organic matter
c) chemical fertilizers
d) all of these
The source of oxides of nitrogen is/are……
a) combustion of fossil fuel
b) lightening and decay of organic matter
c) chemical fertilizers
d) both b and c
The source of oxides of sulphur is/are……
a) combustion of fossil fuel
b) refrigerators and air conditioners
c) volcanic eruption
d) both a and b
The source of Chlorofluorocarbons (CFCs) is/are……………..
a) combustion of fossil fuel
b) refrigerators and air conditioners
c) volcanic eruption
d) all of these
CFCs cause………………...
a) global warming
b) water pollution
c) ozone depletion
d) acid rain
Compounds of lead cause……
a) global warming
b) water pollution
c) damage to brain
d) acid rain
