### Question
What does air pollutant mean?


### Answer
**Air pollutant** has the following meaning in *42 U.S.C. § 7602*:

> any air pollution agent or combination of such agents, including any physical, chemical, biological, radioactive (including source material, special nuclear material, and byproduct material) substance or matter which is emitted into or otherwise enters the ambient air

#### Citation:
  - *42 U.S.C. § 7602*
  - Heading: **CHAPTER 83-ENERGY EXTENSION SERVICE > SUBCHAPTER III-GENERAL PROVISIONS**

