Coal is a portable

Related:

• Minor Operation:
  Coal digging.....
• The coal industry is being run by men with dirty
  mines...
• A diamond is a chunk of coal that made good under
  pressure...
• A Portable Hole holds a lot
  of beer...
• Portable, adj.:
  Survives system reboot...
• Climate is a theory. Weather is a condition. --
  Oliver...