Ameren Missouri which serves a large portion of the Lake area will be receiving additional equipment at two of their power plants. The Missouri Department of Natural Resources is planning to install air monitors near two of Ameren’s power plants located in Franklin and Jefferson counties. Officials say they are the largest sources of sulfur dioxide emissions in the state. However, some say it’s not enough. The sierra club worries the plan could delay action to limit the pollutant which can cause respiratory ailments.