Hazardous materials are liquids or gases that when released are capable of causing harm to people, the environment, and property.

The statement provided in the question is true. Hazardous materials are indeed defined as substances that, when released, can pose risks to human health, the environment, and property. These materials can take the form of solids, liquids, or gases, and their hazardous nature stems from their chemical composition or physical properties, which can lead to toxic effects, ignitability, reactivity, or environmental harm.

Understanding the implications of hazardous materials is critical for public safety telecommunicators, as they may need to coordinate responses to incidents involving these substances. Knowledge of what constitutes hazardous materials helps ensure appropriate actions are taken during emergencies, including evacuations, containment, and informing necessary agencies for proper handling and resolution.