heavy metals are considered as __________ pollutants
inorganic
biodegradable
organic
biological
The disappearance of the plants and animals is due to the
_________ in water.
Nitrogen depletion
Chlorine depletion
Ozone depletion
Oxygen depletion
Rivers and oceans are
Surface water
Underground water
Upward water
Ground water
heavy metals are considered as __________ pollutants inorganic biodegradable organic biological The disappearance of the
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heavy metals are considered as __________ pollutants inorganic biodegradable organic biological The disappearance of the
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