Much of this deployment occurred as a result of market trends toward lower cost clean energy. Under President Obamaâs leadership, the United States has implemented an ambitious suite of policies and measures intended to cut GHG emissions, including: â¢ Tax incentives, RD&D, and loan guarantee programs to spur investments in clean energy; â¢ First-ever federal carbon pollution standards for power plants; â¢ Greenhouse gas and fuel economy standards for cars and trucks; â¢ Energy efficiency standards in buildings and appliances; â¢ Standards to reduce methane emissions from landfills and new and modified sources in the oil and gas sector; â¢  Domestic and international actions to phase down hydrofluorocarbon production and use; and â¢ Programs to promote federal government sustainability MILLION METRIC TONS CO2 E Residential Commercial Agriculture Industry Transportation Electricity Generation Land Use, Land Use Change, and Forestry Note: End-use sector totals exclude emissions from electricity.