pollutant

n. contaminant, material that soils or dirties

Pollution is the introduction of pollutants (whether chemical substances, or energy such as noise, heat, or light) into the environment to such a point that its effects become harmful to human health, other living organisms, or the environment.
See more at Wikipedia.org...

Noun
1. waste matter that contaminates the water or air or soil
(hypernym) waste, waste material, waste matter, waste product
(hyponym) dichlorodiphenyltrichloroethane, DDT
(derivation) pollute, foul, contaminate

Generally, any substance introduced into the environment that adversely affects the usefulness of a resource or the health of humans, animals, or ecosystems..

pollutant
danh từ chất gây ô nhiễm (do xe cộ, động cơ thải ra)
(C) 2007 www.TừĐiểnTiếngViệt.net