Possible Clues:

• Unpleasant vapour or influence
• An unwholesome atmosphere
• Sounds as if it's me as a parent that's befogged by this
• Unwholesome atmosphere, unhealthy vapors
• Unwholesome air
• Some anosmia's masking unwholesome vapour
• A written work intent on reversing unwholesome atmosphere
• Corrupting influence
• Unwholesome or noxious vapour
• Fog