Possible Clues:

• Converted from coal via distillation
• Converted into fuel, as coal
• Heated coal for fuel use
• Out of one's mind, in a way, with 'up'
• Drugged out, with "up"
• Turned to carbon, with carbon given green light?
• Drugged out, with 'up'
• High, in a way, with 'up'