Map of the Napa-Bordeaux Greenline

There's an interesting map in "Red, White and 'Green': The Cost of Carbon In the Global Wine Trade," a paper by Tyler "Dr Vino" Colman and Pablo Paster.

The authors find that transportation from vineyard to glass is the major factor in a bottle of wine's carbon footprint, and that east of the of the line the greater efficiency of shipping by boat offsets the distance between Bordeaux and Napa. See Colman's blog post for more. I can already visualize how an online version of their calculator would work.