Wind turbines take the mechanical energy of wind to generate electricity. Solar cells and solar collectors take the electromagnetic energy in sunlight to generate electrical energy or generate thermal energy to heat a substance. Hydroelectric facilities use the power of water under the influence of gravity to generate mechanical energy and (often) electric power.
Let's throw in the idea that if we plumb (put pipes into) volcanic or thermal vents, we can collect thermal energy from the core of the earth. This can be used directly to heat things or to generate mechanical energy to create electricity.
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.