On a global scale, however, it simply adds to GHG emissions as methane is a much more potent GHG than CO2 (USEPA, 2017). Global food loss and waste generate annually 4.4 Gt equivalent of CO2, or about 8% of total anthropogenic GHG emissions4, making the contr ibution only slightly less than that of global road transportation (Sims et al., By comparison, data on food waste biorefining are difficult to find and are not yet robust.