A tourist asks an Irish old-timer, "How do I get to Dublin?" The old-timer responds, "Well, you can't get there from here." That's what came to my mind when I read Michael Kelly's brief paper "A Challenge for Renewable Energies," at the Global Warming Policy Forum. The gist: "In recent years the energy sector has accounted for about 9 per cent of global GDP, with the implication that the return on energy investment [ROEI] in the world economy is, approximately and as an average, about … [Read more...]