In a response to the threat posed by rising sea levels, South Korea showed the world's first model of sustainable floating city in Busan. 

"Sea level rise poses a threat for some small islands and some low-lying coasts, " says a recent report. The global sea level has risen by eight to nine inches since 1880. What's more frightening is that one-third of the rise in sea level happened in the last 25 years.

The floating city aims to provide technology for coastal cities facing severe land shortages that are combined by climatic threats. The city will serve as the "world's first model sustainable floating city" aiming to be "a structure that rises with the sea" supplying its own food, energy and water.

The floating city has six combined systems: zero waste and circular systems, closed-loop water systems, food, net-zero energy, innovative movement, and coastal habitat regeneration. These interconnected systems will generate 100 percent of the required energy through floating and rooftop photovoltaic panels(光伏板). 

Each neighborhood will treat and refill its own water, process and recycle resources, and provide innovative urban agriculture. The floating city is the world's first model of a sustainable floating community. The interconnected neighborhoods spread across 6.3 hectares that can hold a community of12, 000 people. Starting from a community of 3 platforms with 12, 000 residents and visitors, it has the potential to expand to more than 20 platforms. The floating platforms have dozens of productive stations with photovoltaic panels and greenhouses that can expand and contract(收缩) over time based on the city's needs. 

"I take seriously our commitment ‘ The First to the Future'. Our common future is at risk in the face of sea level rise and its impact on coastal cities, " said Busan Mayor Park Heong-joon, who has set a schedule, including turning Busan into a green smart city and compete for World Expo 2030.

This is as frightening as it is exciting to reach such an achievement, but living in a city that is like the communities where people try to survive in the movie Water World is kind of unhappy.