Harmful or hazardous matter introduced into the environment Ecology: The scientific study of the relationship of organisms to each other and to their environment Ecosystem: the sum of all the living organisms and the physical factors in a particular area Ecotoxicity: The study of toxic effects on nonhuman organisms, populations, or communities.
(Harmful or hazardous matter; introduced; into the environment Ecology)
Harmful or hazardous matter
introduced
into the environment Ecology