Inter Press Service: Spain is the world’s second producer of wind energy, after Germany and ahead of the United States, and plans to continue expanding its infrastructure so as to double its current output by 2012. But new regulations may slow this development. On very windy days, wind energy production can supply 40 percent of Spain’s demand, although the yearly average is 10 percent. The largest share of electricity is supplied by nuclear plants which provide 20.7 percent of the total. Wind …