{HEAD ~ The invention} utilizes {TAIL ~ multiple sorbent injections} for the step wise reduction in pollutants 
{ HEAD ~ The invention } utilizes { TAIL ~ multiple sorbent injections } for the step wise reduction in pollutants
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH