👉 A biohazard refers to a substance that poses a risk of causing harm or contamination when used, stored, or disposed of in an environment. This could include hazardous waste, radioactive materials, toxic substances, or any other material that can cause harm if not properly managed and disposed of. In the context of environmental safety, biohazards are often referred to as "dead zones" because they can be lethal when ingested or inhaled by humans or animals. Biohazardous materials include