[…] –Another by Dr. Sheiphali Gandhi and three other researchers also looked at how the effects of coal-mine dust continue to harm lung function even after a coal miner stops working in the mines.  The study found that 26.9% of the miners who had normal lung function shortly after they stopped working suffered from below normal lung function later on—even though they did not breathe any more coal-mine dust.  This finding lends further support to yesterday’s discussion about the latent and progressive effects of coal-mine dust on miner&#82…. […]