I'm really concerned about the safety of having electric cars and others cars that are silent on?

Your fears are unfounded, awareness is the key word, how many people hear you on your bike. It is the responsibility of every road user to be aware of what is going on around them, that means stopping at junctions and looking, it means pedestrians stopping and looking, it means motorists being aware instead of wittering away on mobile phones, and it means parents taking control of their children, the relative silence of electric vehicles is irrelevant.

If one has a bad luck then no one can save him except He, even if the car has loud noise.

Check out my full question in my hub I couldnt finish it all in the question box.

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.