<prompt> Translate the following text to EnglishHata hivyo, katika uchunguzi wa Jeffords-Lieberman, ambao ulikuwa na viwango vya kupunguza NOx, SO2, mercury na CO2 sawa na S556, tulipata kupungua kwa karibu asilimia 20 ya uzalishaji wa makaa ya mawe na ongezeko la asilimia 30 hadi 50 ya bei ya umeme ikilinganishwa na kesi ya msingi kutegemea dhana za kupenya kwa teknolojia ya nishati.  <response>: However, in the analysis responding to the JeffordsLieberman request that had NOx, SO2, mercury and CO2 reduction levels similar to S. 556, we found significant approximately a 20-30 percent decline of coal generation and a 30-50 percent increase in electricity prices compared to the reference case depending on assumptions of energy technology penetration. 