2. 
Pollution is the introduction of a
contaminant into the environment. It is
created mostly by human actions, but
can also be a result of natural disasters.
Pollution has a detrimental effect on any
living organism in an environment,
making it virtually impossible to sustain
life.

3. Pollution harms the Earth’s environment
and its inhabitants in many ways. The
three main types of pollution are:
 Land Pollution
 Land pollution is pollution of the Earth’s
natural land surface by industrial,
commercial, domestic and agricultural
activities.
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Some of the main contributors to land pollution are:
Chemical and nuclear plants
Industrial factories
Oil refineries
Human sewage
Oil and antifreeze leaking from cars
Mining
Littering
Overcrowded landfills
Deforestation
Construction debris