In Wyoming, where Philip Anschutz is currently building the largest wind farm in the world, coal, which is cheap and plentiful, is the answer to just about everything.
Worries about oil and gas hog the airwaves. But copper is also essential to keep the world running: It threads through your house, your computer, your eco-correct hybrid car. And it's getting just as difficult, expensive, and environmentally menacing as oil to extract. We have entered the era of tough ore.