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  There are 2 different types of coal mines...one is the mineable coal that can damage the enviroment and is expensive and dangerous to mine.The reserve figures differ greatly from 200 - 2000 million tonnes.
  
  The other type of coal is referred to as Underground Coal Gasification and in the UK the British Geological Survey found that the coal resource potentially suitable for UCG was an extra 17 billion tonnes or 300 years at current consumption. UCG has substantial economic advantages, is apparently environmentally friendly and provides a secure domestic energy supply for decades to come
  
  Underground Gasification of Coal (UCG) is the gasification of coal in the seam underground, obviously, and, as such, avoids many of the expenses and disadvantages of traditional mining, whilst generating a fuel with a low emissions profile and the potential for simple carbon capture and storage. The ratio of worldwide inferred to proven mineable coal resources is about 6 to1, indicating that the potential increase in recoverable resources using UCG is enormous, with a total gas volume estimate on the order of 6,900 Tcf.
  
  Through the underground gasification of coal could lead to the generation of power from syngas and natural gas.It's worth considering and is on our doorstep or should I say under our feet.
  
  To which type are you referring to Vic?.

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