At a recent town hall meeting in Jackson, Wyoming, Rep. Harriet Hageman, R-Wyo., offered a simple proposal. If Boulder, Colorado, truly believes that fossil fuels are so destructive, why not prove that life is better without them by giving them up? Anti-fossil fuel crusaders and renewable energy proponents have been unsuccessful in producing a demonstration project in which a small town powers its electricity grid entirely on wind, solar and batteries for at least one year. The idea of such a project was first proposed by Francis Menton, who publishes the “Manhattan Contrarian.” If we’re investing trillions of dollars on...