Pollution Control Systems Remove 95% Sulfur Dioxide Emissions
 
Scrubbers at our Sioux, Coffeen and Duck Creek Power Plants are pollution control systems that remove more than 95% of the sulfur dioxide from the plant's emissions.
  
As hot flue gas passes through each scrubber, a slurry of crushed limestone and water is sprayed into it. The limestone in the slurry reacts with sulfur in the flue gas, creating synthetic gypsum - an inert material that will be captured and stored in a new landfill on plant property. Gypsum is the main component of wallboard.
 
Nuclear Plants Emit No Greenhouse Gases
Though they generate about 20% of U.S. electricity, nuclear power plants like Ameren Missouri's Callaway Energy Center do not burn anything when producing electricity. This means that they do not emit any greenhouse gases or other combustion byproducts.