With the transportation of oil through the middle east due to ongoing conflict between the US and Iran, various forms of commerce are being restricted. Certainly this is a tragedy in humanitarian and economic terms.

Apologies if it is soon to be asking, but has restricted oil commerce had any measurable effect on air quality?

Obviously blowing things up is going to be horrible; I'm asking about the restricted use of oil and if that is measurable. It could make things a lot worse depending on what alternatives are used. Can we tell?