 But as we want to clean up the grid and stop using less polluting fossil fuels, we need clean, firm resources. And enhanced geothermal is one of the most promising options for that. It's the fastest growing at the moment, although it's just one of several other options that are coming down the line and kind of turning from science fiction into reality over the next few years. And you don't need any dirty chemicals or a whole lot of energy to get this geothermal power out of the ground?