sentence1: 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.
sentence2: The Report addresses a response to the request from the two senators.