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It took about 30 weeks, but MidAmerican Energy has built the tallest land-based wind turbine in the nation in southern Iowa. The Des Moines-based power company captured construction of the 379-foot concrete turbine in a video posted on YouTube, and provided the Register a shorter version. Measuring to the blade tips, the super tall turbine reaches to 557 feet, making it taller than the Washington Monument.
A new report from the International Renewable Energy Agency (IRENA) finds that with the right policies in place, the average costs for solar and wind power could decrease by between 26 percent and 59 percent by 2025. The report, titled The Power to Change: Solar and Wind Cost Reduction Potential to 2025, concludes that technology innovations, increased competition, pressure on supply chains and economies of scale could see by 2025 average electricity costs for solar PV fall by 59 percent, offshore wind by 35 percent, onshore wind by 26 percent and concentrated solar power by as much as 43 percent.