Premise: In the Smith/Voinovich/Brownback analysis, when we analyzed SO2 and NOx reduction levels similar to S. 556, mercury reduction levels more modest than S. 556 and no CO2 reductions, we did not find significant impacts on coal production or electricity prices.

Hypothesis: In the Smith/Voinovich/Brownback analysis, when analyzing SO2 and NOx reduction levels, mercury levels were more modest than S 556 and no CO2 reductions due to the revamping of industry.
Relation: neutral