As stated in the US Department of Energy’s Website:
A new DOE report, published by the National Renewable Energy Laboratory, highlights findings from a review of five policy mechanisms that have been successfully applied to hydrothermal exploration activities around the globe – loan guarantees, drilling failure insurance, lending support, grants, and government-led exploration—and their applicability to the U.S. geothermal market. A significant barrier in geothermal project development is the high investment risk during the resource exploration phase of development projects.
To access the Report in PDF format, follow this link
Source: US Department of Energy Website
