anchor: Chapter 3 showed that about 700 man-hours of labor per MWe are required for an SCR system on a coal-fired boiler, and Chapter 4 showed that roughly 10 man-hours of labor are needed per MWe for an ACI system.
positive: Chapters 3 and 4 dictate the necessary man-hours of labor for SCR and ACI systems.
negative: An ACI system requires more man-hours of labor than an SCR system.