I haven't updated in a while, and I see that my previous post was the one in which I asked how (indeed, if) one might responsibly conduct the travel associated with academia. I asked for suggestions related to my upcoming trip to Charlotte, which is now in less than a week.
In the end I decided to fly. I am led to believe, at least for now, that the pollution I'm personally causing by flying is roughly comparable to what I would cause by driving. The reason people say that you pollute as much in one flight as a year's driving is simply that you can travel as far by plane in a day as you might by car in a year. I'm not completely convinced that this is the source of the equivalence, but I'll believe it for now and try to find the complete answer later.
I was also convinced by the simple fact that it was already too late to make the responsible choice; if I wanted to avoid polluting, I should have elected to stay home. To some extent, that's a more difficult choice to make before tenure. I need to get out there and talk to people. If and when tenure happens (you'll be hearing more on that subject in the months ahead), I can make up my own policy for travel.
And yes, I was also swayed by the facts that (a) I found a ticket at a
decent price, and (b) I found an itenerary that leaves from our small
regional airport rather than Pearson. The flight leaves at 6:19am and
I'm giving a talk that afternoon. But it'll be nice to avoid Pearson.