The statement >>1 hour in a coal mine and you get black lung<< is completely wrong. By staying in a coal mine for 1 hour you increase the chance of death by 1

The statement >>1 hour in a coal mine and you get black lung<< is completely wrong. By staying in a coal mine for 1 hour you increase the chance of death by 1 micromort, that by definition means if you did that for about a million times you would very probably die. If the average life expectancy is about 613000 hours, and if you spend every living hour in a coal mine you would still live every other lifespan.