No, they will make up a proxy measurement which will turn out to be grossly inflated, but not before it has served its purpose, which is, of course, to send us to EPA Auschwitz.
I’m guessing they will use human respiration forcasting computer models. That way they don’t have to use facts, just supposition. You know, if you make more than 100k, its anticipated you will emit x much co2, if you live in a red state then increase that by a factor of x, and so on.