GP66 doesn't need hot water to work. It's a plain cold water system. For example, in the food industry where you have large areas of refrigeration, a cold water system is a must because it doesn't drastically raise the temperature as does hot water.
Consequently, huge savings in energy. It's also safe to use cold water...people get burned with hot water and steam cleaners. More.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.