Feb 27, 2020 Protein Production and Consumption
The chart accompanying the article is complex and very rich in both data and text. It illustrates a very important point about the GHGs from different protein sources: the amount of GHG per kilogram equivalent of CO2 can vary over a huge range, depending on how the protein source is cultivated or raised. That is why the chart indicating how much GHG is produced per 100 gm of protein produced is so spread out for beef, lamb and farmed shrimp. Farmed fish systems can be managed to produce relatively low amounts of GHG, but management varies widely and poorly run fish farms can produce significant quantities of methane. The data are clearer in the associated table that provides the median GHG footprint for different protein sources.