1. Pollution is an undesirable change in the phsical, chemical, or buiologocal characteritics of the natural environment, brought about by human activities.
2. Pollution affects the soil, river, seas, and the atmosphere. It is also threathens the life of human, animals and plants habitats and ecosystems.
3. The type of pollutions :
a. air pollution
b.water pollution
c.sound pollution.
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