Our culture is not unacquainted with the idea of food as a spiritually loaded commodity. We're just particular about which spiritual arguments we'll accept as valid for declining certain foods. Generally unacceptable reasons: environmental destruction, energy waste, the poisoning of workers. Acceptable: it's prohibited by a holy text. Set down a platter of country ham in front of a rabbi, an imam, and a Buddhist monk, and you may have just conjured three different visions of damnation. Guests with high blood pressure may add a fourth. Is it such a stretch, then, to make moral choices about food based on the global consequences of its production and transport?