The statement that best describes the intended impacts of a government’s decision is:
The government’s decision to pass the Clean Air Act of 1970 reduced air pollutants and improved public health.
This option specifically refers to a well-documented legislation aimed at regulating air quality and its direct impact on reducing air pollutants, which in turn has positive effects on public health.
The other options do not accurately correlate the intended impacts with the respective government decisions, particularly concerning the regulation of air quality. For example, FEMA (Federal Emergency Management Agency) does not primarily focus on air quality regulation.