| Answer | Crossword Clue |
|---|---|
| SCRANTON | Industrial city of Pennsylvania. |
| ERIE | Pennsylvania industrial center |
| OMSK | Industrial city of Russia |
| ESSEN | Industrial city of Germany |
| OVIEDO | Industrial city of Spain. |
| MILAN | Industrial city of Italy. |
| OSAKA | Industrial city of Japan |
| ESSEN | Industrial city of Europe |
| SMOG | Smoky fog of industrial city. |
| ESSEN | Industrial city north of Cologne |
| WUHAN | Industrial city of central China |
| ESSEN | Industrial city of the Ruhr Valley |
| WUHAN | Industrial city of east central China |
