What does the Clean Air Act put standards on? Primary pollutants Everyday life Photochemical smog

## Step 1<br />The Clean Air Act is a significant piece of legislation in the United States that regulates air emissions from stationary and mobile sources. This law is designed to control air pollution on a national level.<br /><br />## Step 2<br />The Clean Air Act sets standards on primary pollutants. These are pollutants that are directly emitted from a source, such as sulfur dioxide from a power plant.<br /><br />## Step 3<br />The Clean Air Act also sets standards on secondary pollutants. These are pollutants that are not directly emitted but form when primary pollutants react in the atmosphere, such as photochemical smog.<br /><br />## Step 4<br />The Clean Air Act does not set standards on everyday life. This is because everyday life is not a pollutant and does not directly contribute to air pollution.