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