This does not factor in the fact that planes cover vastly more distance than cars though, right? People rarely drive 10000km to eg a conference or vacation.
Does it matter if people drive 10000km over a year for business meetings or if people go to a conference once a year by plane?
How common is it to trade those off against each other? "Oh, because I went to that conference, I'm cancelling all my driving meetings for the rest of the year." is a sentence that has probably never been uttered before I just did now.
I’m also never sure when I read these things; is the amount of CO2 listed for a flight split between the number of passengers?
That one was listed "per 100 * p * km", so that is per person (and per distance).