Related Clues:

• One is creating a din
• Choking conditions beginning to scare cat
• Unwelcome sound
• Number is first to experience interference
• Sound of hooter round middle of shift
• Racket, to a landlord
• Hazy pollution
• Some regularly flee rising pollution
• What I can make with hooter around?
• Clean Air Act concern
• L.A. or Houston problem
• Beijing skyline haze
• Bad big city air
• Business mogul conceals air pollution
• Filthy air