This "Air tree" currently being built in Madrid, Spain is designed to help the environment while simultaneously acting as a social center.
The structure has solar panels which create electricity that is sold to the local electric company. Although it's completely self-sufficient, the Air Tree is not just for creating energy, but also for producing oxygen like a tree and acting as a public gathering site. This building is ACTUALLY being made a reality and is not just a concept.
Structure Produces Energy & Oxygen
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