What commodity represents over 40% of the tonnage shipped on American freight trains?
Coal-fired Low-sulfur coal Coal business Types of coal Coal fired Pitcoal DSSN Coalization Sea coal Sea-coal Coal reserves Coal industry Pit coal Coking coal Coal Coal pulverization Thermal coal Fuel Industry Liquid coal Coal bed Utah state rock Steam coal Fuel industry
dssn low sulfur coal pitcoal coal pulverization fuel industry coal industry coking coal coal steam coal coal fired liquid coal pit coal coalization types of coal thermal coal coal bed coal business coal reserves utah state rock sea coal
coal
WikipediaEntity
Coal