| Answer | Crossword Clue |
|---|---|
| SMOG | Urban pollution problem |
| SMOG | Urban pollution |
| NOISE | Urban pollution |
| SMAZE | Urban pollution |
| SMAZE | Urban air pollution |
| NOISE | Some urban pollution |
| SMOG | Urban air pollution |
| NOISE | Kind of urban pollution |
| NOISE | Cause of urban pollution |
| NOISE | Form of urban pollution |
| SIRENS | Some urban noise pollution |
| NOISE | Type of urban pollution |
| NOISE | Source of some urban pollution |
