Based in Bilbao , Iberdrola is also the world 's largest producer of wind energy . Iberdrola reported a 36 % fall in net profits in Spain for 2012 despite heavy investment . Based in the Basque city of Bilbao , Iberdrola is also the world 's largest producer of wind energy . Comment:
Based in Bilbao , Iberdrola is also the world 's largest producer of wind energy . Iberdrola reported a 36 % fall in net profits in Spain for 2012 despite heavy investment . Comment: