What is more fuel efficient; buy a new hydrogen fueled car or mixing it into the fuel of current cars? #engineers #question?

Hydrogen-fueled vehicles follow 2 concepts. In the first concept, they convert hydrogen to electricity in a fuel cell, and the electricity drives an electric motor. The second concept is direct combustion of hydrogen.

Neither concept is very efficient because of losses in the production, transport and storage of hydrogen. Electric vehicles promise to be more efficient, provided a few more battery breakthroughs, and electricity generation by renewables. Hydrogen can be produced by either electricity or thermal processes.

Electricity is not a real option - if you have electricity already, why in the world would you convert it to hydrogen to use it as electricity. With thermal processes, we think about large coal-fired or nuclear stations, producing hydrogen directly instead of electricity. It would provide US an option to use its large coal-reserves, possibly in combination with carbon sequestration.

But such large, industrial energy economy does not appear the currently desired scenario at political level.

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.