Quote Originally Posted by walkerwek1958 View Post
NOx levels at the roadside is, as I understand it, the primary concern that has to be addressed.

I don’t understand your questioning and I dislike any statement that starts with the word ‘so’.

Feel free to share your disagreement, don’t be afraid to baffle me with science, last time I checked I still had the chemistry degree I earned in the 80s whilst working full- time in industry.

I’m more concerned with the flawed logic than the environmental issues, I’m the antithesis of a tree- hugger.
Wasn't having a go, just trying to clarify as I was getting a little lost. If the emissions at the roadside are paramount then I wouldn't have even considered mpg as that equates to economy. I thought you were digging deeper by saying the less fuel efficient car may emit lower NOx but is more damaging to the environment because it requires refuelling more often?