What section of the Clean Air Act addresses lead concentrations in the air?

The National Ambient Air Quality Standards (NAAQS) section of the Clean Air Act is specifically designed to establish and manage national air quality standards for various pollutants, including lead. This framework sets limits on the acceptable concentrations of lead and other hazardous substances in the air to protect public health and the environment. The EPA is responsible for implementing and enforcing these standards, ensuring that air quality is monitored and maintained for the safety of communities.

The importance of NAAQS lies in its comprehensive approach to regulating pollutants that have known adverse effects on human health, particularly vulnerable populations such as children. By setting these standards, the NAAQS plays a critical role in maintaining safe air quality levels and preventing harmful exposure to lead, which can lead to serious health problems.

In contrast, the other options relate to different aspects of air quality management or regulation that do not specifically address lead concentrations in the air. Title I of the Clean Air Act outlines the definitions and general provisions, while Interstate Air Quality Control refers to provisions related to air quality management across state lines. Emission Standards focus on limits for specific sources or types of pollution rather than directly addressing ambient air quality levels or concentrations.