premise: AC Activated carbon ACI Activated carbon injection CAAA Clean Air Act Amendments DCS Distributed control system ESP Electrostatic precipitator FF Fabric filter FGD Flue gas desulfurization GWe Gigawatt (electric) IPM Integrated Planning Model LSD Lime spray dryer LSFO Limestone forced oxidation MEL Magnesium enhanced lime MWe Megawatt (electric) NAAQS National Ambient Air Quality Standards PJFF Pulsejet fabric filter PLC Programmable logic controller SCR Selective catalytic reduction SIP State Implementation Plan TVA Tennessee Valley Authority 
hypothesis: There are no amendments to the Clean Air Act.