Free-Air CO2 Enrichment (FACE) is not the most contrived acronym in the world but it’s worth a quick mention because (1) I am involved in a project looking at the effects of elevated CO2 and (2) it is one of those acronyms that, whilst hard to Google without extra keywords, gives lots of opportunities for punny titles. (And who doesn’t love a punny title now and again.) Indeed, one such punny title was the inspiration of today’s post, an ecology Editor’s Choice article in Science: “About FACE” (Sugden AM, 2013. Science 341: 938).
As faces do emit CO2 and, by doing so, enrich the free-air CO2, I’m rating FACE as post hoc. (Although I don’t think that’s what they had in mind!)