### Question
How does the law define enhanced geothermal systems?


### Answer
Under *42 U.S.C. § 17191*, **enhanced geothermal systems** is defined as:

> 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**

