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With rising sea level and scarcity of developable land in Hong Kong, more urgent and extreme measures have to be taken to develop Net Positive built environments. Large scale land reclamation can no longer suffice nor does it answer ecological concerns.

The Hydro-Tower is the response to such an extreme condition. It is a campus of different living environments floating or parked in the ocean. The campus’s “Infrastructure Sector” is an inverted tower plunged into the ocean. It forms a huge open atrium in the middle to collect seawater, with recycling factories on the lower level, and a hydroelectric power generator at the bottom to generate clean energy 24/7. Not only does the tower clean the seawater constantly it also recycles the debris that are deposited into the tower.

Based on the “Infrastructure Sector” typology, other essential functions of society such as the “Living Sector”, “Farming Sector” and “Wilderness Sector” are designed and carefully placed around each other to form a self-sustaining community. This group of inverted towers will be able to produce food, energy, potable water and other upcycled goods. The towers are connected with a walking path where habitants can roam freely around each sector.