The U.S. Congress is considering whether to enact a “cap and trade” program that would enable the federal government to regulate greenhouse gas emissions (GHG). Policymakers are seeking to enact a comprehensive energy and climate change bill that aims to increase energy efficiency, address the risk of global warming, and transition the economy to the carbon-constrained future that many have come to expect. AGC is concerned that new federal legislation and/or regulations intended to control GHG emissions could deter new construction and directly affect contractors’ operations. Obstacles to Construction 1. Using the Clean Air Act (CAA) to regulate GHGs could