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