I found such a photo on the Internet and became interested in what function such a structure could perform.
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If a duct that transfers water is an Aquaduct, then a duct that transfers nature is an Ecoduct
In that case, the bridge in OP’s image is currently just an airduct.
What about a duct that transfers ducks?
Ducktoduct
What if the Ducktoduct was made of duct tape?
Well that would just be hilarious.
