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Why not hang vertical turbines on the outside? There are some nice designs built to be installed on the sides of skyscrapers.

Wind turbines on the outside could boost daytime production and help to even out the 27/7 power production instead of having it drop to 0 once the sun goes down.

The white painted top is what got me thinking it should be a dark color to increase heat retention and aid the updraft.

It does seem like a lot of wasted space if it is not contributing to the efficiency of the design.