I don't think a huge carbon tax (as would be needed to change over to renewables quickly enough) is as realistic as it sounds to the technocratically-minded. If

I don't think a huge carbon tax (as would be needed to change over to renewables quickly enough) is as realistic as it sounds to the technocratically-minded. If you tell people they can't visit their family who live across the country a couple times per year, they will vote you out of office. Look at the huge negative reaction to fuel taxes in France and the UK. Here in the US, we've got a lovely climate-denying party that is already structurally favored to win anyway. I think you instead need to combine a strategy of making it more expensive in progressive ways with building more infrastructure and finding technology to support low-carbon travel.