; (2) describe and make recommendations on whether the carbon fee rate and annual increases prescribed by section 9902(c) of such Code should be adjusted in order to optimize the efficiency and effectiveness of this Act in achieving the emissions reduction targets set forth in section 9903 of such Code; (3) describe the potential of the carbon fee to achieve future emissions reduction targets set forth in section 9903(a) of such Code through the year 2050; (4) describe and evaluate the effectiveness of the carbon fee in reducing emissions from key sectors of the economy, including sectors of the economy that have decreased their carbon emissions, sectors of the economy that have increased their carbon emissions, and sectors of the economy in which carbon emissions have not changed; (5) make findings and recommendations to Federal departments and agencies and to Congress on actions that could be taken to reduce carbon emissions in the sectors of the economy in which carbon emissions have not decreased; (6) make findings and recommendations on adjusting regulations enacted under the Clean Air Act ( 42 U.S.C. 7401 et seq.) and other Federal laws that affect economic sectors achieving the emissions reduction targets set forth in section 9903 of such Code