How does LEED address indoor air quality?

LEED addresses indoor air quality by outlining strategies for improving and maintaining healthy interior environments. This is a critical aspect of the LEED rating system as it recognizes the significant impact that indoor air quality has on occupant health and well-being. By providing guidelines and best practices for ventilation, filtration, material selection, and maintenance, LEED encourages the creation of spaces that not only enhance the quality of the air we breathe but also promote overall health for building occupants.

This approach includes ensuring adequate ventilation to reduce contaminants, using low-emission materials to minimize the release of harmful substances, and implementing effective cleaning and maintenance practices. By focusing on these strategies, LEED helps to create indoor environments that support the health and comfort of everyone who occupies the space.

The other options misrepresent the principles of the LEED framework. For instance, ignoring ventilation needs or promoting harmful materials would undermine the very goals of LEED, which is focused on sustainability and health. Additionally, relying completely on outdoor air fails to consider the complexities of indoor environments and may not adequately address the various pollutants that can accumulate indoors. Thus, the comprehensive approach of LEED in promoting healthy indoor air quality is encapsulated in the correct answer.