Yes, I wonder how much this politician gets to say this sort of stuff.
I don't believe anything that comes out of a American politicians mouth, and certainly not out of a British ass kissing Monarch cronies mouth.
I own a 2015 VW Jetta, and other than a software update to control the chemical infusion process of the diesel exhaust system, it does not belch black smoke, is not filthy in any way and continues to get excellent gas mileage.
Diesel's are a target because of their efficiency, lower cost production of fuel than petrol and those two things when combined spell cheaper operation costs, and a cleaner environmental impact.
Two things that continue to improve over time, which are proving to be the ire of environmentalists stuck in the 1980's.