Btu—British thermal unit

CO₂—carbon dioxide

CSAPR—Cross-State Air Pollution Rule

H₂O—water

hr—hour

kWh—kilowatt-hour

lb—pound

mmBtu—million Btu

MWe—megawatt electrical

MWh—megawatt-hour

NO_X—nitrogen oxides

O₂—oxygen

ppm—parts per million

scfh—standard cubic feet per hour

SIP—State implementation plan

SO₂—sulfur dioxide

TR—Transport Rule

yr—year