Related Clues:

• Portmanteau pollution mixture
• Something in the air
• It may be difficult to drive in
• View disrupter
• Cause of an air alert
• Unhealthy air
• It's hard to see through
• Urban problem
• Metro-area haze
• Big city problem
• Eye irritant
• Industrial-strength air?
• Environmental problem
• Sun blocker
• Unwelcome cloud