| Hazardous Substances . Biohazards . Chemicals, Hazardous . Environmental Substances, Toxic . Toxic Environmental Substances . Environmental Toxic Substances . Materials, Hazardous . Substances, Environmental Toxic . Substances, Hazardous . Substances, Toxic Environmental . Hazardous Chemicals . Hazardous Materials . Toxic Substances, Environmental . Elements, compounds, mixtures, or solutions that are considered severely harmful to human health and the environment. They include substances that are toxic, corrosive, flammable, or explosive. . 0.67
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