Originally aired May 24, 2012. Matt Clouse, Director, Renewable Energy Policies & Programs, U.S. Environmental Protection Agency (EPA); and Mary Sotos, GHG Protocol Initiative, World Resources Institute (WRI), will join CRS in presenting a webinar providing answers to questions about the difference between Renewable Energy Certificates (RECs) and carbon offsets, how the markets for these commodities interact, and the extent to which each can be used to address greenhouse gas (GHG) emissions. The webinar will examine key areas of confusion including REC definitions, additionality, and ownership of reductions from renewable energy.