### Question
How does the law define greenhouse gas?


### Answer
Under *22 U.S.C. § 7901*, **greenhouse gas** is defined as:

> carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons, and sulfur hexafluoride

#### Citation:
  - *22 U.S.C. § 7901*
  - Heading: **CHAPTER 86-CLIMATE CHANGE TECHNOLOGY DEPLOYMENT IN DEVELOPING COUNTRIES**

