This ultimately reduces {TAIL ~ the methane saturation} of the coal bed and increases the capacity of the coal bed for {HEAD ~ hydrogen storage} 
This ultimately reduces { TAIL ~ the methane saturation } of the coal bed and increases the capacity of the coal bed for { HEAD ~ hydrogen storage }
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD