Vincent Callebaut Architectures has envisioned a radical underwater colony for "climate change refugees" 3D printed from recycled materials taken from the ocean's floating garbage patches. This particular proposal of "oceanscrapers" is sited off the shore of Rio de Janeiro. It's aim is to provide a sustainable habitat with 10,000 housing units, office and work space, sea farms, gardens, community orchards and much more, while fostering marine life.