Electricity-generation markets across the U.S. are changing, which is to say they are modernizing. Our research shows time and again that coal-fired generation plants are no longer the viable business propositions they used to be.

The only two uranium mines operating in Arizona and an associated mill in southern Utah are set to cease operations temporarily as prices for the ore decline.

Federal officials said Wednesday they will review whether two plants near the proposed Rosemont Copper mine are threatened, the second time in as many weeks they have put species near the mine under review.