Lead is not a major air pollutant regulated under the Clean Air Act, but it is regulated under other environmental laws, such as the Resource Conservation and Recovery Act.

The primary goal of the Clean Air Act is to protect human health and the environment from air pollution. This is achieved through a variety of means, including setting air quality standards, regulating air pollution sources, and promoting the development of clean energy technologies.

Solar panels are not air pollution control devices. They are used to generate electricity from sunlight.

Remediation is the process of removing pollutants from soil. This can be done through a variety of methods, including phytoremediation, bioremediation, and incineration.

Organic matter is not a type of soil pollutant. It is a natural component of soil that is essential for plant growth.