How is the government involved in air pollution?

Government Partnerships to Reduce Air Pollution. The Clean Air Act calls for state, local, federal and tribal governments to implement the Act in partnership to reduce pollution. Roles vary depending on the nature of the air pollution problem. This is a copy and paste from a governed website so I am not claiming this statement as my own.

The Clean Air Act calls for state, local, federal and tribal governments to implement the Act in partnership to reduce pollution.

Local governments play an important role in reducing indoor and outdoor air pollution and the impacts of climate change by educating communities about air quality issues and participating in air quality improvement policies, programs or initiatives in buildings they own and/or manage, transportation and energy programs, and land use decisions