One good thing about our current economic crisis: It might bring a sense of reality to our expectations about renewable energy. The best recent evidence is the decision by T. Boone Pickens to abandon plans for his monster wind farm in Texas, billed by the oil billionaire as a step in transforming the United States from dependence on oil and coal. With those billions he was able to make seemingly credible promises made more so by his $2 billion order from . . .