There are still many factories that have some controlled units (yellow) or do not have any controlled units (red). Only about half of the factories shown on the map have full controls (green). Therefore, more work needs to be done by the
EPA and factories to effectively control air pollution.
Part D
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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