|Graphic by Windpower Engineering & Development; click on it for a larger version|
In Oklahoma, long a fossil-fuels hub, the shift to wind energy is significant. "With the additional wind capacity, renewable energy will make up 40 percent of PSO's generating capacity by 2021. The utility already has 1,137 megawatts of wind — 22 percent of total capacity — through various power-purchase agreements," Monies reports. It's also an example of how utilities wanting to grow are increasingly looking to wind and solar. As demand for electricity is weakening and the cost of building solar and wind farms is decreasing, utilities are buying the farms outright and passing the cost of acquisition on to customers, Bloomberg reports.