waste
waste material
waste matter
waste product
CFC
DDT
chlorofluorocarbon
dichlorodiphenyltrichloroethane
halon
nitrogen oxide
sulfur dioxide
sulphur dioxide
additive
aerosol
by-product
carcinogen
catalyst
chemical
chlorine
contaminant
contamination
dioxide
effluent
fertilizer
hydrocarbon
monoxide
nutrient
ozone
particulates
pesticide
pollution
runoff
toxin
vapors
mutant