I find it odd that people, (I suppose they are the educated middle class, the ones who actually have choices about how much they should consume) seem to be volunteering, making the choice to consume less, which amounts to a form of 'regressive tax'compared to the vast swathes of consumption enjoyed by the wealthy.
It reminds me of religious zealots scourging themselves in order to atone for their sins and show God how much they worship him. Having been brought up a Catholic, I know a lot about that mindset.
In my world, it was only the 'jetset' that flOoew all over the place, otherwise it was prohibitively expensive for most people.
It would pay for the state to create a network of maintenance hubs for cars, which were free, and made sure that everyone's cars were running optimally and were in good nick. For example there is no tech barrier to cars lasting for decades, if properly maintained. The really big environmental cost, isn't CO2, but the huge resources used to make the things in the first place! In theory there are vast savings to be made by rationalising the production of automobiles and making all the parts interchangeable and cheap. Two or three models to choose from, instead of hundreds.
But that's all water under the ####ing bridge now, as we should have begun all this half a century ago, while there was still time to make a difference.