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q

q

by Md.Mehedi Hasan Santo -
Number of replies: 2

what is pollutant?

In reply to Md.Mehedi Hasan Santo

Re: q

by al jabir -
pollutant is a interior substance, so we can say inferior substance is more than specific levels of the products.
In reply to Md.Mehedi Hasan Santo

Re: q

by Dr. Nizam Uddin -
a substance present in nature, in greater than abundance due to human activity