Where can the list of hazardous air pollutants be found?

The list of hazardous air pollutants can be found in Section 112 of the Clean Air Act. This section is specifically dedicated to regulating airborne substances that are known to cause serious health effects, including cancer and other illnesses. The Clean Air Act outlines the criteria for identifying these pollutants and mandates the Environmental Protection Agency (EPA) to create a comprehensive list based on the potential hazards of these substances to human health and the environment.

The significance of this designation is paramount because it enables appropriate regulatory actions aimed at reducing emissions of these pollutants, thereby enhancing air quality and public health. The Clean Air Act serves as a robust framework for enforcing these standards and ensuring that hazardous air pollutants are effectively monitored and controlled.

The other options are related to different aspects of environmental regulation. For instance, while the Clean Water Act and the Resource Conservation and Recovery Act are crucial for water safety and waste management, respectively, they do not address the regulation of airborne pollutants. Similarly, DOT regulations pertain to transportation regulations and hazardous materials, which are outside the scope of air pollution control.