### Question
How does EMISSION STANDARDS FOR MOVING SOURCES define low-polluting fuel?


### Answer
Under *42 U.S.C. § 7554*, **low-polluting fuel** is defined as:

> methanol, ethanol, propane, or natural gas, or any comparably low-polluting fuel

#### Citation:
  - *42 U.S.C. § 7554*
  - Heading: **CHAPTER 85-AIR POLLUTION PREVENTION AND CONTROL > SUBCHAPTER II-EMISSION STANDARDS FOR MOVING SOURCES > Part A-Motor Vehicle Emission and Fuel Standards**

