The push to revive America’s coal industry has generated alarm because it is almost certain to worsen the climate crisis. But the industry also brings an immediate human cost: black lung disease. Black lung is an often fatal condition contracted by miners who breathe in coal and silica dust on the job. Rates of the disease dropped towards the end of the 20th century, thanks in part to federally mandated reductions in the amount of coal dust miners were allowed to breathe in. Now, researchers at the National Institute for Occupational Safety and Health have documented a troubling new trend: Black lung disease cases, particularly among younger miners, have risen sharply since the mid-1990s.