He added that the taxes imposed by European Union governments are not making reinvestment in Europe an attractive option . Based in Spain , it is also the world 's largest producer of wind energy . Iberdrola reported a 20 % fall in net income in Spain for 2012 despite heavy investment . Spain -- where it is headquartered -- is the eurozone 's fourth - largest economy .
Based in Spain , it is also the world 's largest producer of wind energy . Iberdrola reported a 20 % fall in net income in Spain for 2012 despite heavy investment . Spain -- where it is headquartered -- is the eurozone 's fourth - largest economy .