In response to a May 17 , 2001 request from Senators James M. Jeffords ( VT ) and Joseph I. Lieberman ( CT ) , this report describes the results of a modeling study done to evaluate the potential impacts of reducing nitrogen oxides ( NOx ) , sulfur dioxide ( SO2 ) , mercury ( Hg ) , and carbon dioxide ( CO2 ) emissions from the US electric power sector .
This report greatly affected the public image of the two senators .