In a nugget of very good news for the renewable energy sector, a survey of 163 wind energy experts has found that in the coming decades, the cost of electricity generated by wind should plunge, by between 24 and 30 percent by the year 2030, and even further by the middle of the century. One key reason? New wind projects are about to get even more massive, in both the offshore and onshore sectors. As turbines get taller…