This is despite {HEAD ~ the extra cost} associated with injecting {TAIL ~ large quantities} of fresh water instead of brine 
This is despite { HEAD ~ the extra cost } associated with injecting { TAIL ~ large quantities } of fresh water instead of brine
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH