 And so today we depend on natural gas and coal and our existing nuclear power plants for that role. 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.