The lost equipment was worth tens of millions of dollars, but much more significant is the fact that the landslide has shut Bingham Canyon down for an as-yet undetermined length of time. Much more significant because Bingham Canyon is not just another copper mine. Physically, it is the largest in the world, and it is among the most productive. Each year it supplies about 17 percent of U.S. copper consumption and 1 percent of the world’s. When a cog that big loses its teeth, the whole global economic machine goes clunk.First to feel the effect (other than the workers at Bingham Canyon, of course, who have been asked to take unpaid leave) was Rio Tinto, Bingham’s owner. Its stock opened lower the morning after the landslide, and its analysts projected that the company’s profits would drop 7 percent for this year, with ripple effects for some years after. Bad for investors, sure. But those losses, in turn, will mean less capital for Rio’s investments in its numerous other ventures, and since Rio is the third-largest mining firm in the world—if you live in anything like an industrialized economy, you use its products every day—the ripple effects spread far beyond Rio’s shareholders. A pinch in Rio’s supply lines will push up metal prices for everyone.