Free images results:
 

Smog pictures, stock photos and images

 
1


 
Refinery. Royalty Free Stock Images
Author: Seamoon
 
1


 
Also, here are some commercial RF-licensed images that match your search criteria:  
Smog in sky Royalty Free Stock Photo
Author: Xdrew
Smog Royalty Free Stock Photos
Author: Zirafek
Smog Stock Photos
Author: Qxinxing
Smog Stock Image
Author: Qxinxing

Explore more commercial options: More Smog Stock Illustrations & Vectors | More Smog Stock Video Footage