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(a) What is pollution?
(b) State three circumstances that bring about pollution
(c) State three consequences of water pollution
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Most candidates defined pollution as bad odour coming from the body.
Circumstances that cause pollution was well treated.
The required answers to the questions are as follows:
(a) Meaning of pollution
Pollution is a process or an act by which harmful substances called pollutants are released into the environment making it unsafe to live in.
Key words – (1) harmful
(2) making the environment unsafe.
(b) Circumstances that bring about pollution
- Dumping of refuse at unauthorized places, which rot and give offensive smell.
- Urinating at unauthorized places which also gives offensive smell.
- Defecating into rivers making the water unsafe for use
- Washing and bathing into streams, ponds, river etc
- Release of chemical waste by manufacturers into streams, lakes, river etc.
- Using dirty containers to fetch water from wells, streams etc.
- Taking animals to drink from streams, ponds, rivers.
- Burning of items which release smoke into the air.
- Leaving waste to fly about in the environment
- Smoke emitting from vehicles and generators
- Excessive noise from radio, people etc and blowing of whistles which produce noise pollution.
(c) Consequences of water pollution
- Water becomes unsafe to all living things
- People become exposed to water-borne diseases e.g. cholera, dysentery, bilharzias, when they use the contaminated water.
- Living things in the water are destroyed/killed – example, fish
- Environment becomes unsafe for people to live in
- There are epidemic which may lead to death
- Economy will be affected negatively.
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