Consider the following:

  1. Shale Gas
  2. Coal bed methane
  3. Tight Sand stones
  4. Methane Hydrates

Choose the “Unconventional” sources of Natural Gas from the above:

[A] 1
[B] 1 & 2
[C] 1, 2 & 3
[D] 1, 2 , 3 & 4

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