What do you call all the dirty haze that forms when air pollution combines with moisture in the air?

Answer:
Why, that would be Smog -- a worried derived from the two words, Smoke and Fog, first reportedly used in LA that has plenty of both.
First answer by Cjonb. Last edit by Cjonb. Contributor trust: 1199 [recommend contributor recommended]. Question popularity: 1 [recommend question].