https://www.scientificamerican.com/article/giant-turbines-propel-boom-in-wind-energy/ > The wind industry is growing, literally. American wind developers are installing increasingly large turbines, capable of generating twice as much power as their predecessors and opening up new areas of the country to wind development. > The trend arrives at a critical time for the industry. The production tax credit, a federal subsidy, is set to end at the end of the year. But unlike in previous years, when wind development ground to a halt when subsidies dried up, industry representatives are predicting only a modest slowdown.