Re: Taxes
I mentioned that essential vehicles should be converted to hydrogen first, such as farm equipment, mining equipment, locomotives, ships, and public transit. On further consideration, I realized that if this move was government subsidized, such as public transit & farming, then if there is a demand for hydrogen in excess of its supply, say if people started buying hydrogen cars, then the price of hydrogen would skyrocket.
Therefore the price of essential services would skyrocket, and taxes would go up. So in fact we would have to deter people from consuming excessive amounts of hydrogen for personal transportation.