### Question
How is the "clean alternative fuel" defined?


### Answer
The term **clean alternative fuel** is defined in *42 U.S.C. § 7581* as follows -

> any fuel (including methanol, ethanol, or other alcohols (including any mixture thereof containing 85 percent or more by volume of such alcohol with gasoline or other fuels), reformulated gasoline, diesel, natural gas, liquefied petroleum gas, and hydrogen) or power source (including electricity) used in a clean-fuel vehicle that complies with the standards and requirements applicable to such vehicle under this subchapter when using such fuel or power source

#### Citation:
  - *42 U.S.C. § 7581*
  - Heading: **CHAPTER 85-AIR POLLUTION PREVENTION AND CONTROL > SUBCHAPTER II-EMISSION STANDARDS FOR MOVING SOURCES > Part C-Clean Fuel Vehicles**

