Tight coal regulations have produced many casualties in the industry. Those who survived coal cleansing ended up in other businesses far from what they initially set out to do. For instance, Consol Energy (CNX), a company that has mined coal for more than 150 years, turned its back on coal business in the last decade to drill natural gas. Though the transformation process was long and challenging, Consol Energy says it has made steady gains in gas business that it is reluctant to go back to coal even if Trump administration were to create an enabling environment for coal producers to flourish again.