Hey! This is too "cool"--in several senses of the word. If you haven't heard of "Urban Air Trees," check out this video.
Video report about the newly constructed "Urban Air Trees" in Madrid, Spain. These unique structures are designed to both affect the surrounding environment and act as a social centers. Using live plants and photovoltaic cells the Air Tree produces a substantial amount of oxygen and energy. Designed by Urban Ecosystems.
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