### Question
How is the "affected source" defined?


### Answer
The term **affected source** is defined in *42 U.S.C. § 7651a* as follows -

> a source that includes one or more affected units

#### Citation:
  - *42 U.S.C. § 7651a*
  - Heading: **CHAPTER 85-AIR POLLUTION PREVENTION AND CONTROL > SUBCHAPTER IV&ndash;A-ACID DEPOSITION CONTROL**

