Please look closely at the images to follow. Study the wind generator image for a while then switch to the tower.

When you have had a good look at the images, I would like you to try to decide when the size of the tower is equivalent - in terms of your perception - to the size of the windmill. I do not mean physically identical, I mean in terms of their apparent magnitude as a visual landscape element. The visual impact if you like.

When you have decided, look at the corresponding number in the lower left corner of the tower image and click on this number in the scale below.

If you have maximized your window and are ready to proceed click the continue button.