If there was real concern about the environment, reduction would be the way to to. There isn't. I think Hydrogen can have a place as a fuel, the japanese haven't given up yet and jumped on the electric battery bandwagon? Having several technologies is better than betting on a single one. One thing the "ship shortage" should have made people think about is how much crap is being put into a modern car, and why so much for what is a tool to achieve a simple goal, move from A to B. All those components require industries to make them. Reducing the time spent moving would also help very much. That of course requires housing to be thought around reducing the need for traveling. Instead of being a speculative get-rich-quick business.