Question

under the resource conservation and recovery act (rcra), what kinds of waste are legally considered hazardous waste?
domestic sewage from homes, offices, and large businesses
only physically solid waste like metals, excluding gases and liquids
waste materials that can cause harm to humans or the environment

Explanation:

The Resource Conservation and Recovery Act (RCRA) focuses on waste that poses risks. Domestic sewage is typically managed under other regulations. Hazardous waste isn't limited to solids; gases and liquids can also be hazardous if they meet certain criteria (like toxicity, reactivity, etc.). RCRA - defined hazardous waste is about harm potential (to humans or the environment), which aligns with the third option.

Answer:

waste materials that can cause harm to humans or the environment