In addition to the regional GHG (green house gas) related activity, there is a growing consensus at the national level] that the United States should reduce its GHG emissions by 60 to 80 percent by 2050 to support the global efforts to reduce GHG emissions. The leading proposals currently before US federal lawmakers recommend a cap-and-trade system to reach GHG reduction goals. The figure above shows the potential impact of the leading proposals on future emissions, according to an analysis published by the World Resources Institute in December 2007.