Polluted sites that can be cleaned and revamped are termed at sites. brownfield

Brownfield

A brownfield is a polluted site which can be cleaned and revamped. This land is  contaminated by hazardous pollutants. The land which is being not in used is converted into a waste land or brownfield. The land is used to disposed off industrial, household and radioactive wastes.

linnaeus is the father of taxonomy, which is the system of classifying and naming organisms. one of his contributions was the development of a hierarchical system of classification of nature. today, this system includes eight taxa: domain, kingdom, phylum, class, order, family, genus, and species.