### Question
How is the "reasonable further progress" defined?


### Answer
The term **reasonable further progress** is defined in *42 U.S.C. § 7501* as follows -

> such annual incremental reductions in emissions of the relevant air pollutant as are required by this part or may reasonably be required by the Administrator for the purpose of ensuring attainment of the applicable national ambient air quality standard by the applicable date

#### Citation:
  - *42 U.S.C. § 7501*
  - Heading: **SUBCHAPTER I-PROGRAMS AND ACTIVITIES > Subchapter Referred to in Other Sections > Part Referred to in Other Sections > Subpart Referred to in Other Sections**

