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Legally, hazardous waste is any discarded liquid or solid that contains substances known to be: 1. Fatal to humans or laboratory animals in low doses. 2. Toxic, carcinogenic, mutagenic, or teratogenic to humans or other life-forms;
Description. Hazardous materials are substances that could harm human health or the environment. Hazardous means dangerous, so these materials must be handled the right way. Hazard communication, or HazCom, is teaching people how to work with hazardous materials and waste.