Carbon dioxide: Blame where blame is due?

SAN FRANCISCO — One all-too-familiar side effect of international trade is the outsourcing of jobs, or their movement from developed nations (where production costs are relatively high) to regions where a variety of costs are relatively low.

But the geographic separation of production and consumption also has a less recognized, or at least a less frequently discussed, effect — the “outsourcing” of greenhouse gas emissions, says Steven J.