In her panel, 'Energy Efficiency: Greatest New Resource", Callahan looks at the chief forcing mechanisms - regulations and financial incentives - that have effectively accelerated the deployment of energy efficieny in the U.S. Her presentation covers the recent history of energy efficiency in U.S. policy, marked by President Obama's energy platform and FY2010 budget, as well as his recent overhaul of corporate average fuel economy standards. Callahan also examines the wealth of energy efficiency funding included in the American Recovery and Reinvestment Act of 2009, and the potential for carbon emissions reductions in the House of Representative's American Clean Energy and Security Act of 2009.