What is classified as bio-hazardous waste?

Bio-hazardous waste refers to any type of waste that poses a threat to human health or the environment due to the presence of infectious agents or materials. This includes waste that has the potential to carry disease, such as blood-soaked materials, used needles, or any items that have been contaminated with bodily fluids. The classification as bio-hazardous is specifically tied to the risk of disease transmission or injury that these materials pose.

In contrast, the other options do not align with the definition of bio-hazardous waste. Waste that is biodegradable is more about its ability to decompose naturally, which does not inherently mean it poses a health risk. Waste composed of plastics and metals can be harmful but does not fit the criteria for bio-hazardous waste unless it has been contaminated. Lastly, recyclable waste pertains to materials that can be repurposed and does not directly imply any health or safety hazards. Therefore, the focus on the potential for disease or injury clearly defines why the correct answer pertains to waste that may cause disease or injury.