Pollution in the sky (4)
I believe the answer is:
smog
(Other definitions for smog that I've seen before include "Pea-souper" , "Smoky haze" , "Dirty mixture of smoke and fog" , "Thick polluted mist" , "Polluted atmosphere" .)
I believe the answer is:
smog
(Other definitions for smog that I've seen before include "Pea-souper" , "Smoky haze" , "Dirty mixture of smoke and fog" , "Thick polluted mist" , "Polluted atmosphere" .)