There has been a Cap and Trade system in place in the USA since the early 90’s for Sulfer Dioxide - the cause of acid rain. “Sour” crude is no longer refined in volume here as a result. That is why you see Light Sweet Crude or WTI referenced in oil trading here. Acid rain has since abated.

Crude oil prices actually fell after this legislation. Look into Cap and Trade and its corporate sponsors - you will find Conoco and Shell among them. Money is the driver here as always. American companies want to sever the Saudi connection that we (and they) are dependent on.