The concept of hazardous waste includes which of the following?

The concept of hazardous waste encompasses substances that pose potential threats to health or the environment. This definition is broad and includes a variety of materials, which can be in solid, liquid, or gaseous forms. Hazardous waste can originate from various sources, including industrial processes, healthcare facilities, and households, and is characterized by its potential to cause harm due to factors such as toxicity, reactivity, ignitability, or corrosivity.

Understanding the nature of hazardous waste is crucial in managing and mitigating its risks effectively. Regulations surrounding hazardous waste are designed to protect public health and the environment by ensuring safe disposal, treatment, and storage of these materials. Therefore, this option accurately reflects the comprehensive nature of hazardous waste, distinguishing it from more limited categories such as only chemical substances, solid waste, or radioactive materials, which do not encompass the full scope of hazardous waste as defined by environmental health standards.