Agreed that %-wise the Veyrons are a pittance, but there are 10000x as many other Energy-wasting habits, each one of which shall always have its yes-Buts.
Propaganda will be a necessity.. slogans work, be they ever so humble or nonsensical.

Kids Can learn the difference between self-serving Sales ones and those recognizing just how many habits must be transformed, and with no time to screw up;
adults ... already have the bad habits. How/if/when we learn to do this sea-change effectively? is obviously a major ingredient of ... well you know.

Unprecedented IS--or ought to be--a scary word, considering the intransigent who Will-not lift a finger, 'even if it Kills them'. I no Master-solutions either: and we'll need millions of such.
Carrion. We might become that; Will become that if homo-Sap behaves as usually he does.
(Maybe that's candidate for the scariest part? of the ∱eare-mix.).