| Answer | Crossword Clue |
|---|---|
| FIREDAMP | Coal mine's combustible gas |
| FOSSILFUELS | Combustible organic materials, such as oil and coal, that may be key contributors to global warming: 2 wds. |
| PITS | Coal mines. |
| PITS | Coal mines |
| DAMP | Poisonous vapor in coal mines. |
| MARKSPITS | Medal-winning swimmer's coal mines? |
| REOPEN | What the coal mines do periodically. |
