Mando Xie proposes green floating cities to enable "human civilization to continue" on the ocean

Mando Xie imagines humanity moving into ship-like floating cities covered with trees to escape rising sea levels in this proposal, which is a finalist in Dezeen's Redesign the World competition powered by Twinmotion.
Xie imagines converting aircraft carriers to create the floating cities in his proposal, which is called Titan Art 2100.
Almost half of the surface of each city would be covered with trees to provide food and a pleasant, shaded park-like environment for citizens. A freshwater lake a