Installing scrubbers in smokestacks and switching to cleaner-burning fuel are the two methods available to Northern Power for reducing harmful emissions from its plants  Scrubbers will reduce harmful emissions more than cleaner-burning fuels will
Ttherefore, by installing scrubbers, Northern Power will be doing the most that can be done to reduce harmful emissions from its plants
Aside from harmful emissions from the smokestacks of its plants, the activities of Northern Power do not cause significant air pollution.