 Natural gas by your generation. So as the solar panel becomes more and more of an impact on your grid, you have to have more and more backup generation because they don't work all the time. And so that's what's happening in California is they've closed their nuclear except for San Onofre. They've cut out their coal. So all they're using is natural gas. And when the solar panels don't work, which again is 85% to 90% of the time,