I agree with all of the above apart from the "the world would benefit" bit. I cannot see it making an atom of difference to be honest.
I seriously wonder whether UK politicians (in fact politicians generally) are motivated more by:
(a) Being seen to be very "green" as a potential vote winner
(b) No fucking clue
(c) Spotting the convenient angle of being able to justify whatever tax increases they like in the name of "the climate emergence". How fucking convenient.
Getting reamed by the taxman for everything from petrol to your electricity bill, to you road tax, or going on holidays... all to make very much less than 1% difference in global CO2 output?