The average emission rates in the United States from burning coal are 13 lb/MWh (pounds per megawatt hour) of SO2 and 6 lb/MWh of NOx. (A pound is a unit of mass, and a megawatt hour is a unit of energy.) Imagine that a scientist developed a new emission control device that can cut each of these emissions to 35% of the current output. If the device were installed, what would the average emission rates change to?
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