Food has historically been traded based on relative price whereby low-cost producers dominate the marketplace. Border tax advocates now want to add the cost of an externality, greenhouse gas emissions. This change could possibly turn the world on its head. Since meat is criticized for being a major culprit of climate change, it provides a good example of potentially outsized effects from giving more weight to emissions than to price. Based on FAO data on the intensity of emissions by country and meat product, rain forest advocates will be glad to know that Brazil should not be producing and exporting beef, milk (products), lamb, eggs, or pork. But strictly looking at the intensity of CO2 equivalent emissions per kilogram of meat product pr...