### Question
What does supercompliant coal mean?


### Answer
**Supercompliant coal** has the following meaning in *42 U.S.C. § 15991*:

> coal that contains less than 1.0 pounds of sulfur dioxide per million Btu

#### Citation:
  - *42 U.S.C. § 15991*
  - Heading: **CHAPTER 149-NATIONAL ENERGY POLICY AND PROGRAMS > SUBCHAPTER IV-COAL > Part C-Federal Coal Leases**

