CONSOL Energy consoles its customers with the warming benefits of coal and natural gas. CONSOL is one of the US's largest coal mining companies, along with Peabody Energy and Arch Coal. In 2015 the company had 5.6 trillion cubic feet equivalent of proved natural gas reserves and 3 billion tons of coal reserves, mainly in the Appalachian basin. CONSOL primarily mines high BTU coal, which burns cleaner than lower grades. Customers include electric utilities and steel mills. CONSOL delivers coal using its own railroad cars, terminals, and barges. The company also engages in natural gas exploration and production through CNX Gas.