Like any technology the costs are high but over time the cost drops.
Well, I’m glad that you have so much confidence in our government’s decisions. I hope you are right, but really the costs are not appropriate for now. Change is required when needed, not for environmental made up reasons.
We are just adding to the cost of maintaining the military today instead of waiting until it is necessary. Sorry, but if you take into the equation the cost and pollution necessary to produce substitute fuels, the environment loses anyway.