firedamp (noun)

1. Why did the coal miner bring a canary into the mine? To check for firedamp!

2. The artist depicted the dangers of firedamp in a haunting painting of a coal mine explosion.

3. The worst firedamp explosion in history occurred in a coal mine in Wales in 1913, resulting in the loss of many lives.

4. In some religious traditions, coal miners pray for protection against firedamp before entering the mines.