Metal Smelting, Inc., operates a planta "major source"that emits hazardous air pollutants for which the Environmental Protection Agency has set...

Metal Smelting, Inc., operates a plant¾a "major source"¾that emits hazardous air pollutants for which the Environmental Protection Agency has set maximum levels of emission. The plant does not use any equipment to reduce its emissions. Under the Clean Air Act, this is most likely