### Question
How is the term hazardous air pollutant defined?


### Answer
The term **hazardous air pollutant** is defined in *42 U.S.C. § 7412* as the following:

> any air pollutant listed pursuant to subsection (b) of this section

#### Citation:
  - *42 U.S.C. § 7412*
  - Heading: **SUBCHAPTER I-PROGRAMS AND ACTIVITIES > Subchapter Referred to in Other Sections > Amendments**

