They're the experimental and new technologies that are coming along, it is our intention of course to use those first in the thermal communities as we wish to get off of diesel power. But there are other initiatives. We are also encouraging people to reduce the amount of power they use to LED, more efficient refrigerators and so on, so we're hoping that the amount of power that they require is going to be reduced, and this 20 per cent figure which has been referenced several times today is a technical number in the sense that if you're going to have a mixture of diesel and solar, you can't go above the 20 per cent solar without expending a great deal of money for new systems.