These are two pictures of the coal fired power plant at Delta, Utah.
- The first picture shows the smokestack, with mountains barely visible in the background.
- The second picture shows a power line, with the smokestack barely visible in the background. In this picture, the mountains are totally obscured by smog.
These pictures are in no way retouched.
It was a clear day (only an hour before) just across the border, in Nevada.
The photos were taken from the South, with the sun behind the camera (which would have given the clearest shots).
This is smog.
This is what it looks like here on a good day.
I've heard it looks a lot worse during winter temperature inversions.