A current article from Reason magazine (their tag line — "Free Minds and Free Markets" — might reveal a hint of a bias), "The Food Miles Mistake: Saving the planet by eating New Zealand apples" questions one of the main ecological premises of the localvore movement, saying:

...a comprehensive study done by the United Kingdom's Department of Environment, Food and Rural Affairs (DEFRA)... reported that 82 percent of food miles were generated within the U.K. — consumer shopping trips accounted for 48 percent and trucking for 31 percent of British food miles. In the United States, a 2007 analysis found that transporting food from producers to retailers accounted for only 4 percent of greenhouse emissions related to food. According to a 2000 study, agriculture was responsible for 7.7 percent of total U.S. greenhouse gas emissions. In that study, food transport accounted for 14 percent of the greenhouse gas emissions associated with agriculture...

It's a bit reminiscent of the Environmental Building News feature, "Driving to Green Buildings: The Transportation Energy Intensity of Buildings," which said,

With average new code-compliant office buildings "using" twice as much energy getting occupants to and from the buildings as the buildings themselves use for heating, cooling, lighting, and other energy needs, the green building community needs to focus greater attention on the transportation dependency of our buildings.

These transportation energy questions — whether it's about food, building products, or getting back and forth from work, are worth thinking about. The EBN feature "On Using Local Materials," said:

...short hauls generally represent a disproportionately large share of total transportation impacts... short hauls are almost always done in trucks, as opposed to rail or ship. Second, because the trucks used for short hauls are smaller than those used for long hauls, proportionately more of the energy is used for moving the truck itself. And third, because short hauls are typically over secondary roads with a lot of stopping and starting, efficiency is reduced. Given all these factors, the total environmental impact of hauling materials 1,000 miles by train to a supply yard may be less than the impact of hauling materials 100 miles by truck to a job site.

Depending on things like geography and transportation methods, Chinese bamboo flooring or a bottle of French wine could have a good bit less transportation energy to the same point of delivery than solid wood flooring from Oregon or a bottle of domestic wine from California.