For the past month, commuters at Seoul's Sangdo subway station have been met with a surprising sight: a fully functioning farm growing leafy lettuce, sprouts and microgreens.
This underground farm doesn't rely on soil and sunlight but uses special LED lighting, hydroponic growing trays and a smart network that controls factors such as temperature, humidity, CO2 levels and light intensity.
The project is called Metro Farm, and the Sangdo location is the first of five subway farms slated to open by the end of the year in a partnership between the Seoul Metropolitan Government and Farm8, a South Korean agriculture company.
