Vatican City is only 110 acres.
According to World Architecture News, local residents complained of the smell from rotting vegetables in the market. A design competition was held to clear the air and improve the area.
Samoo Architects & Engineers have created a design to not only reduce the smell of kimchi, but also to improve public, retail, and wholesale spaces.
Several design elements will create efficiencies in the market area. From the article:
"The two functions will be distinctive and separate with a focus on efficiency within the wholesale quarter, and festivity within the retail quarter... Three pavilions with enhanced daylight and ventilation via Eco-tubes will replace two existing structures to provide a greater footprint for fruit and vegetables. Fisheries and Meat pavilions will be located at the northern edge to allow better access from delivery vehicles and will emit a night glow to give visual presence towards the transport."
The green roof will also provide space for recreational activity, walking, and improved aesthetics. Although the article doesn't mention it, the addition of such a large green roof will also improve the air quality of Seoul. By reducing fine particulate air pollution on such a large scale, the whole city will benefit. Additionally, Seoul's water treatment system will enjoy the benefits of the green roof. More storm water will be captured and filtered by the green roof, improving the efficiency of the water treatment system.
As South Korea grows in economic importance, it is exciting to see such a significant, sustainable, project taking shape in the capital city.