In the first episode of down to earth with Zac Efron what do they learn How far do the bore holes go into the earth

In the first episode of "Down to Earth with Zac Efron," Zac and his co-host Darin Olien travels to Iceland to learn about the country's sustainable energy practices. They visit a geothermal power plant and learn about harnessing heat from volcanic activity to produce renewable energy.

Regarding the boreholes, the episode does not specifically mention how far they go into the earth. However, they do mention that the boreholes are used for extracting steam and hot water from underground reservoirs. These reservoirs are formed by drilling deep wells, and the heat from the natural hot water is converted into electricity through geothermal power plants. The specific depth of the boreholes is not provided in the episode.