Thanks for your feedback! Would you have a better source that I could refer to?
i would not suppose that any single metric can give us meaningful insight.
The study is a meta study over 38,700 farms constituting 90% of global calories consumed though; would this still be considered a single metric? I’m looking for something else I can send to people if not this.
if I told you that I went to 38,700 farms myself and cataloged exactly how much land it was using, that doesn’t tell you what that land could be used for. it might not be useful for anything except farming. so the bare metric of land use isn’t helpful. and then we consider other footprints: water use, ghg emissions, lca’s.
none of these is able to give you an actual understanding of how the water is used or where the emissions come from or how LCA’s stack up against each other.
My favorite example is cotton: cotton is raised for textiles. it is very thirsty. it takes up some amount of land. The farming of it emits some amount of greenhouse gas. there is also waste product from the production of cotton: cotton seed. Cotton seed is fed to cattle. Even if we take the weight of the cottonseed that is fed to cattle and we take that portion of the crop by weight and we say that some portion of the crop by weight is responsible for a certain amount of water use and land use and greenhouse gas emissions, the truth is that cattle aren’t responsible for that. In fact feeding that cottonseed two cattle is a conservation of resources.
All of these metrics, all of the sources of the material, they all need to be reevaluated in a holistic manner. that doesn’t mean a meta study where you compare LCAs, a metric that itself is not supposed to be transferable between studies. it means actually doing the hard work of figuring out how to make every individual agricultural operation operate at its peak efficiency for the metrics that we want to see improved: water use, emissions, land use, run off, etc.
ideologically opposing animal agriculture is just going to leave a hole in the agricultural space where products had previously been diverted after becoming industrial waste now need to be used or become waste again.
