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27 points
ECOTOXICOLOGIES is validvalid
ECOTOXICOLOGY, the study of substances that are harmful to the environment
ECOTOXICOLOGY, the study of the destructive effect of waste materials, etc. on the environment
ECOTOXICOLOGY, the study of substances that are harmful to the environment
ECOTOXICOLOGY, the study of the destructive effect of waste materials, etc. on the environment