| Answer | Crossword Clue |
|---|---|
| RADON | Gas in a uranium mine |
| RADON | Danger in a uranium mine |
| afterdamp | poisonous gas formed after the explosion of firedamp in a mine |
| afterdamps | AFTERDAMP, poisonous gas formed after the explosion of firedamp in a mine |
| afterdamp | Choking gas, rich in carbon monoxide, left after an explosion of firedamp in a mine |
| enrich | process so as to add or increase the proportion of a desirable ingredient enriched uranium enriched natural gas |
