As far as I, a total layman, can tell from the excessively wordy study, they are assuming that the process is powered by fossil fuel energy. They spend an enorm

As far as I, a total layman, can tell from the excessively wordy study, they are assuming that the process is powered by fossil fuel energy. They spend an enormous amount of time on calculating energy requirements, and about a sentence on energy sources. So it seems the solution would be easy; don't use fossil fuel energy. Also it looks like the study only looks at CO2 from meat production, and turns a blind eye to methane, which is the real killer from meat production.