There seem to be some who just do not grasp how large these 500 foot turbines are. They are as tall as a 50 story building. Many that people have driven by in good wind areas are 200 to 300 feet tall. As the developers go to marginal wind areas they need taller turbines. More recent studies are showing there .are more mechanical issues with these larger turbines and they only last for around 10 to 15 years and some not even that long.