 Yeah, free energy sources would be solar and wind. Well, wind is also solar energy. But for solar energy, there is a lot of development done, especially thermal solar energy for producing hot water. It's very efficient, very ecological and has a lot of upsides. And then there is the photovoltaics that for a climate with very long winters and peak energy demand in wintertime may not be all that ideal. It's more a technology for the solar rich areas of the world. And wind is something that is partly overdone. So it's a development where, at least in Europe, we have a lot of installations of wind farms. And many of them are huge and many of them are too close to where people live. So this movement, I still like wind power, but it's getting too close to people. It's getting areas that are sort of destroyed in their appearance, in their, well, how you would live through too many installations. And we see that there are also health aspects there. There is the infra sound that is produced by them, and they can have influence several kilometers away making people ill. And that's also something that has to be faced. Even though we often do like wind power, we should install them in a reasonable way and also look at the downsides. There is now the wind energy creation by the airborne wind energy. I don't know if you've heard about that. With like flying objects that are circling around and creating energy by that. That may be a better way because it's not, well, near to the earth surface where the wind speed is very low. So that's a development what is upcoming. I think the keyword would be airborne wind energy or something like that.