Based on the IPCC reports, agriculture contributes a share of 13.5 percent to global anthropogenic GHG emissions. Moreover, food processing accounted for a share of GWP which I could not find it in the literature review. In addition, methane emissions from MSWs landfills (which is mostly organic materials) accounts for 11% of total methane emissions in the world. As you know, methane has a potential of 21 times more than CO2 in global warming phenomenon. In my opinion, the share of GWP of food supply chain, use and disposal can be considered more 20 percent which is a remarkable percentage! What do you think?