Sunday, 2 September 2018

Pollution: definition, types, biodegradable and non biodegradable pollutants




What is pollution?
Pollution comes from the Greek word, which means defilement. It may be defined as the addition of materials or energy into the environment; damages it, making it undesirable or unfit for life.




Pollutants
The materials and energy that causes pollution, are known as pollutants. Most pollutants are caused or produced by industrial and agricultural activities.

However, natural processes such as excretion and volcanic eruption also produces pollutants.

Pollutants are divided into three, namely;
I) Biodegradable pollutants
II) Non biodegradable pollutants.
III) Poisons

Biodegradable Pollutants 
These are organic products that are broken down by natural processes. It includes, plant and animal remnants such as; bones from animals, leaves, and stem of dead trees.


Non Biodegradable Pollutants
It includes, those materials that cannot be broken down. Examples are; glass, plastics, tin, cans, bottles, and scrap of metals.


Poisons
It includes heavy metals and their salts. Examples are; lead, uranium, fertilizers, mercury, fungicides, pesticides, herbicides and so on.


Types of pollution 

1) Air Pollution
2) Water Pollution
3) Land Pollution
4) Noise pollution

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