Pollution is the adding of harmful substances to the
Pollution is the process
whereby various harmful substances are added to the environment
(land, water, air etc.) by human and natural activities.
The various types of
pollution that exist are:
Natural activities that
cause pollution are, for example, volcanic eruptions, sandstorms
and natural forest fires. These events cause a large
amount of substances such as ash and dust, which are harmful to our
health, to be added to the environment.
Although some natural
events may contribute to pollution, human activities have a more
harmful impact to the environment.
How do humans contribute to pollution?
As the world population
increases rapidly, there is an increasing demand for food,
materials and energy. The activities that produce these products
tend to pollute the environment.
- DOMESTIC ACTIVITIES
- Homes and
offices produce a lot of rubbish and sewage every day.
by-products of industries are highly hazardous e.g. sulphur
- Farms, too,
produce a lot of waste. Waste from animals, pesticides and
herbicides are washed into rivers and then into the
How does pollution affect our environment?
Pollution has adverse
effects on all living and non-living things.
Some of these effects
- EFFECTS ON MAN
pollution can cause breathing problems and eye, throat and skin
irritation. When solid waste is not properly treated and disposed
of, it can become a breeding for pests and disease can
EFFECTS ON PLANTS
- Leaves find
it difficult to manufacture food in polluted air. When trees begin
to lose their leaves, they may eventually die. When there is too
much chemical content in the water absorbed by the roots, it can
also affect plant life.
EFFECTS ON ANIMALS
- Oil spills
in the seas and oceans result in birds and animals (e.g. penguins
and seals) being coated in oil. This makes it difficult for them to
float and keep warm and they may eventually die. Solid waste in the
water encourages the growth of algae which depletes water of oxygen
and kills marine life.
EFFECTS ON BUILDINGS
pollution discolours and corrodes buildings and statues, e.g. the
Louvre Museum in France, historical buildings in London and the Taj
Mahal in India are all covered with a layer of
First subtopic: Air Pollution