Related Clues:

• Feature of a bad air day?
• L.A. haze
• Visible air
• City skyline blurrer
• Air condition?
• Pollution that may sting the eyes
• Traffic consequence
• Cause of sniffles
• Big city pollution problem
• Scenery spoiler
• Coughing cause
• Breathing inhibitor
• EPA concern *
• Its main ingredient is ozone
• Visible air pollution