Coal
abutyrin

What is driving the decline of the U.S. coal industry? Most of the blame has gone either to Obama’s “war on coal” (EPA regulations) or to cheap natural gas. But there’s a third factor at work, which has gotten much less press:

Coal is getting more expensive to produce.

Why? First, the easiest-to-reach coal has been mined, which means coal companies have to dig deeper and go after thinner seams and smaller deposits. That costs more, in both energy and money. And second, transportation costs, mainly the cost of the diesel fuel that runs the trains that carry the coal, are rising.