"Climate agenda" definitely needs the quotation marks. The first Environment minister he had chosen was a TV personality, which was mostly to show willing. Since then, that guy quit (live on radio) because -who'd have thought- a government led by a former lobbyist for Areva wasn't too keen on "the environment" and they wouldn't let him implement anything useful. The new minister shouldn't open his big mouth as much, and his second in command is now a former lobbyist for Danone, very much pro-palm oil.
He's also not reversing, just postponing for six months, which isn't likely to change much.
There are some grants to help you buy a brand new car if you send your old car to the junkyard, but many people still cannot afford new cars. There are still many old cars running, it's not that rare to see non-collection cars that date from the 60s or 70s, driven by the people who bought them new. The average age is apparently 12 years.
The cheapest fuel is currently around 1,4€ a litre or US$ 6 a gallon.
Macron worries about the interests of his very rich friends, definitely not about the planet.