No, of course he can’t back it up.
There isn’t a single mass manufacturer of EVs yet. Not only that, but the Chinese are banning EV manufacturers because there are too many.
https://insideevs.com/china-too-many-electric-cars/
Plus there is the issue of raw materials. With even Tesla now using REE motors, there just isn’t enough Nd/Pr around.
Then there’s trucks. They aren’t going EV in the next decade and a half.
And with ICEs like Mazda’s HCCI getting emissions below coal fired stations, until they’ve sorted out renewable sources, even the greens can’t claim any logic to phasing them out.