4. Coal Dust Explosion
One of the worst industrial disasters/accidents in the world occurred in France, in the Courrieres mine in 1906. More than a thousand people were killed and injured in an explosion, although the tragedy could have been prevented. Allegedly, smoke and toxic gas were reported in the mines in the days before the explosion occurred, but the work didn’t stop anyway. The search lasted for three days only and the remaining people trapped inside the mines were declared dead. However, a few survivors managed to get out of the mines twenty days after the explosion, according to Britannica.