“This temperature corresponds to 0 degrees Fahrenheit, so it was “probably a round, easy number to remember”
That’s what Allouche and team will be working on next, as they build their research summary into a full report, to be published in September 2024. “These findings give good reasons for ‘3 degrees of change’ to be further explored,” Allouche says.
Three Degrees Of Change: Frozen food in a Resilient and Sustainable Food System (PDF)
TlDr: They think that it would be advisable to move the freezing storage temperature from the typical -18° to -15°.
My freezers are set by default at -20° though. I should probably change that.