Among the ways Donald Trump vows to “make America great again” is reviving the US coal industry. That’s a stretch considering the plight coal faces today in the US. 

The combined value of the top four US coal companies fell from $33 billion in 2011 to $150 million in 2015. Coal’s declining role in the US power supply saw it go from 50% in 2006 to 42% in 2011, to 30% in 2016. US coal production dropped 19% in 2016 alone. In 2015, between 11 gigawatts (GW) and 14 GW of US coal capacity went off line.