Which of the following is an example of a hazardous material?

Used motor oil is classified as a hazardous material due to its toxic properties and potential environmental impacts. It contains harmful substances such as heavy metals, polycyclic aromatic hydrocarbons (PAHs), and other contaminants that can pose risks to human health and the environment if not managed properly. When disposed of improperly, used motor oil can leach into soil or waterways, leading to contamination and harm to ecosystems.

In contrast, plastic waste, food scraps, and paper products are considered non-hazardous materials under most circumstances. While some plastic materials can be harmful to the environment due to their persistence and tendency to leach chemicals under specific conditions, they are not categorized as hazardous materials. Food scraps typically undergo biological decomposition and are often compostable, while paper products are biodegradable and can be recycled without posing significant health risks.