I know the thread is mostly for fun, but only considering CO2 is a bit misleading when accessing how environmentally (un)friendly a car is.
Besides, I think the point is really that we should be making and buying vehicles more like this (in the positive aspects) rather than that we should all drive 40 year old Citroens.
Not worth engaging
But yeah, the author's wrong on so many things. Starting with putting his stuff on mastodon in the first place. Or not withstanding that the same people he cheers on, are outlawing diesel engines.
Tbh though, a lot of the latter was fueled from US-industrial anti-diesel propaganda.