Which of the following is included in hazardous wastes?

Hazardous wastes encompass a wide range of substances that can pose significant threats to human health and the environment if not managed properly. This includes chemical wastes, which can be toxic, corrosive, or reactive; biological wastes, which may contain pathogens or infectious materials; and flammable materials, which can ignite and cause fires or explosions under certain conditions.

Chemical wastes include a variety of industrial by-products and discarded chemicals that may be hazardous to both health and the environment. Biological wastes often arise from medical and laboratory settings and can include anything from sharps to cultures that present infection risks. Flammable wastes can include various solvents and organic materials that can easily catch fire, presenting both safety risks and environmental hazards.

Given the diverse nature of what constitutes hazardous waste, the comprehensive option encapsulates all categories—chemical, biological, and flammable—demonstrating the broad scope of hazardous waste management in ensuring environmental and health safety. Thus, the collective recognition of all these forms underlines the need for careful and stringent regulations in handling and disposing of hazardous wastes.