High Country News: In a 2007 ruling on a dispute concerning fuel economy standards for cars, a judge sent a clear message to federal agencies. They could no longer continue business as usual and fail to account for climate change when assessing the costs and benefits of regulations. The value of carbon emissions reduction is certainly not zero, Judge Betty B. Fletcher wrote in her opinion for the U.S. Court of Appeals for the Ninth Circuit. And by treating it as such, her opinion declared, the government was acting...