- - L.A. problems
- - Weather problems
- - City blankets
- - City problems.
- - Atmospheric problems.
- - Urban problems
- - Clean Air Act targets
- - Causes of bad air days
- - Urban woes
- - L.A. hazes
- - Dirty blankets?
- - Urban pollutants
- - They are smoky and foggy
- - Suffocating blankets
- - Urban pollutions
- - Urban palls
- - EPA concerns
- - Urban blights
- - Smoky, foggy conditions
- - They may be photochemical
- - Hazes of a sort
- - Murky atmospheres.
- - Mixtures of smoke and fog.
- - Air pollutions.
- - Air pollutants
- - Bad air conditions
- - Hazes
- - Obscures, with "up"
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