

since this study relies on poore-nemecek 2018, at least in part, I’m suspicious. they also admit they didn’t gather the data themselves, and although they never mention LCAs directly, my guess is there is a similar mishandling of source data. but I’ll read it today or tomorrow
The LCA studies that they cite specifically give guidance that it cannot be combined with other LCA studies. some of the studies they cite are meta studies that actually acknowledge this, but the poore-nemecek paper doesn’t even bother to acknowledge it.