What is a primary function of the Air Resources Board?

The primary function of the Air Resources Board is to regulate pollutant emissions from mobile sources. This encompasses vehicles such as cars, trucks, buses, and other forms of transportation which are significant contributors to air pollution. The board implements regulations and standards designed to reduce harmful emissions that impact air quality and public health. By setting emissions standards and encouraging cleaner technologies, the Air Resources Board plays a crucial role in improving air quality across the state.

In contrast, the other options involve functions that fall within the purview of different agencies or departments. Local land use planning is typically managed by city or county planning departments rather than the Air Resources Board. Building safety inspections are conducted by state or local building departments that focus on structural safety rather than air quality. Water quality regulations are overseen by different entities, such as the State Water Resources Control Board, which focuses specifically on water quality issues rather than air pollution.