Ask a typical college student about “environmentally friendly” energy sources, and the student will usually respond with comments on wind energy, solar energy, or at least “renewable fuels.” Coal would never make the list. But as an economist, I’m always teaching students about trade-offs. There is no energy source that is costless, either financially or in terms of environmental degradation. Wind energy, for example, requires metals that have to be mined, access roads and transmission lines … [Read more...]