Related Clues:

• L.A. problem
• Uproar about one's bill
• Air quality problem
• Environmental portmanteau
• Unwanted sound
• Vista spoiler
• Loud racket
• Unpleasant sounds
• Urban air problem
• Skyline haze
• Return manuscript with green light for air pollution
• Portmanteau that, when heavy, hampers driver
• Emissions consequence
• Extraneous data
• Sound, disagreeable perhaps