Interesting piece in the NYTimes on the environmental cost of shipping groceries.
Certainly in the wealthiest countries, and now also in developing nations, there is an increasing demand for foods regardless of season or where they're produced (most cheaply). But the obvious cost is the CO2 and other global warming gases emitted from transportation.
"Under longstanding trade agreements, fuel for international freight carried by sea and air is not taxed. Now, many economists, environmental advocates and politicians say it is time to make shippers and shoppers pay for the pollution, through taxes or other measures."
I don't know whether consumers will be willing to pick up the slack (in terms of extra taxes) on imported goods...or whether it might be a good idea (in the same way that insane gas prices have boosted the public drive toward alternative energies)....