Pollution is the undesirable change in the physical, chemical and biological constituents of our surroundings.
The ozone layer is a thin part of the Earth's atmosphere that absorbs almost all of the sun's harmful ultraviolet light.
Waterborne diseases are illnesses caused by microscopic organisms.
Soil pollution refers to the degradation of land.
Think about its cause
Think about mining activites and its effects.
Think about the after effect of acid rain.
Think about the types of pollution.
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