<prompt> Translate the following text to EnglishRais Bush anataka kupanua mpango huu kujumuisha uchafuzi mpya mbili - oksidi za nitrojeni na zebaki - wakati pia kupunguza kwa kiasi kikubwa uzalishaji wa SO2 kuruhusiwa na sheria ya sasa.  <response>: President Bush wants to expand this program to include two new pollutants - nitrogen oxides and mercury - while also dramatically reducing the SO2 emissions allowed by current law. 