[aerohead]

I'm thinking of it along the lines of COVID.
We have a CARBON-64 vaccine, which will kill the carbon dioxide pandemic scientists have been warning us about since 1957. EVs.
Vehicles with carbon comorbidity issues might be prioritized on an mpg basis.
Those with the lowest fuel economy would be triaged for immediate 'vaccination' and retirement from service. Recycled. Replaced with a zero-carbon vehicle.
On down the line, on an efficiency basis.
The least-offensive emitters are the last to be electrified. Say, a Plug-in Prius, @ 55-mpg.
Carrots are favorable to sticks. Incentives. Wrap it up in the flag and make people feel good about the whole thing.
Sicily hit 122-F in August, an all-time heat record. Avocado and orange production suffered. Farmers who could, dug reservoirs, as ground water is now 'iffy'. If they have another year of drought, it's game over for agriculture.
And we continue to add carbon, doing nothing to remove what's already there. Removing carbon IS the solution according to climatologists, but first we've got to stop digging the hole we're in.
40-mpg is good but it isn't zero.