### Question
What does enhanced geothermal systems mean?


### Answer
**Enhanced geothermal systems** has the following meaning in *42 U.S.C. § 17191*:

> geothermal reservoir systems that are engineered, as opposed to occurring naturally

#### Citation:
  - *42 U.S.C. § 17191*
  - Heading: **CHAPTER 152-ENERGY INDEPENDENCE AND SECURITY > SUBCHAPTER V-ACCELERATED RESEARCH AND DEVELOPMENT > Part B-Geothermal Energy**

