The program encourages the use of methane recovery (biogas) technologies at confined animal feeding operations that manage manure as liquids or slurries. These technologies reduce methane emissions while achieving other environmental benefits. Although the overall impact of AgSTAR on GHG emissions has been comparatively small on a national scale, livestock producers in the dairy and swine sector have demonstrated that the practices can reduce GHG emissions and achieve other pollution control benefits while increasing farm profitability. (http://unfccc.int/resource/docs/natc/usa_nc5.pdf)