### Question
What does acid precipitation mean?


### Answer
**Acid precipitation** has the following meaning in *42 U.S.C. § 8901*:

> the wet or dry deposition from the atmosphere of acid chemical compounds

#### Citation:
  - *42 U.S.C. § 8901*
  - Heading: **CHAPTER 97-ACID PRECIPITATION PROGRAM AND CARBON DIOXIDE STUDY > SUBCHAPTER I-ACID PRECIPITATION**

