Finding the carbon footprint of wine...

This story about the carbon footprint of wine contains an interesting map at the bottom.

Essentially it cuts the US into two. West of this line it's more carbon efficient to drink Napa Valley wines. East of the line it's more carbon efficient to drink French wines. Carbon efficiency refers to the energy and pollution creted from shipping this wine from it's source.

This "grape divide" must also have other implications. Think of all of the technology from California, or the films for that matter. Does it take less energy to watch French films on the East Coast than it does to watch Hollywood films?