3. The term “Environment” literally
means “surrounding”. It is a
branch of science which deals
with the chemical phenomena
occurring in the environment.
4. Addition of undesirable materials into the atmosphere either due
to natural phenomena or due to human activity on Earth which
adversely affect the quality of air and hence affects life on Earth.
5.
6.
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16. Types of Smog
Classical smog: mixture
of smoke, fog and
sulphurdioxide.
Photochemical smog:
action of sunlight on
saturated hydrocarbons,
nitrogen oxides.
