As an East Coast Francophile, when a story about this came out a few months ago, I felt smug.
Reality of course is that Bordeaux is a bit of an exception, as it is a port town. I wonder if most Rhones, Burgundies, Champagne etc are trucked (I realize Rhone is navigatable, but river barges are much less used these days in general) a fair distance to port. I also wondered if no CA wine is shipped by rail, which would be more efficient. Probably not, non-bulk rail cargo is way down.
Certainly my beloved Piedmont wines must be trucked a fairly good distance to ports.
I try to reduce my carbon footprint when I can. But I am not yet advanced enough to buy wine I don't like in tetrapaks to reduce footprint (and then you of course have trash issues).
Similarly, we like sparkling water, so to try and be more responsible bought a seltzer siphon, which we love (we still buy some bottled seltzer, because we drink a lot of water and I don't feel like jumping up during dinner to recharge siphon). But I confess we also sometimes buy Badoit or Gerolsteiner, so I am nothing if not inconsistent.
So I sometimes do things to reduce footprint, sometimes don't. Fairly fanatical about recycling (and have a worm farm in basement to help compost). I am not a totally green person, but I think at least being somewhat conscious is better than complete oblivion.
PS: Carbon footprints are one good argument against the dreaded oversized bottle!