[pm90]

I wonder if this may be because of the weather, but why can't you grow vines on the metal trees to make it "green"? Or some sort of wall hugging vegetation. I mean, sure its not the same as a tree, but at least it might look nicer.

[bluehawk]

My guess is that the vanes on the top do something to disrupt the wind and stop it from reaching street level at such high speeds. The vines growing between the vanes could prevent this effect from happening.

[smnrchrds]

I am not sure vines can survive Calgary winter.