Natural gas 
 •90-95% methane, 5-10% ethane
 Petroleum
 •gases (bp below 20°C)
 •naphthas, including gasoline (bp 20 -
 200°C)
 •kerosene (bp 175 - 275°C)
 •fuel oil (bp 250 - 400°C)
 •lubricating oils (bp above 350°C)
 •asphalt (residue after distillation)
 Coal