How to interpete "grey loaded air"?

in 'the weathercock of the village church, still to be seen through * the grey loaded air*, has become some creature out of Hans Andersen. '

any example of the similar use?

2015-01-12T03:50:13Z

I can see what it means . but any example of the same structure?

Robert J2015-01-12T03:47:02Z

Mist or Fog.

Things still visible, but not clearly.