A 29-year-old woman, Zandile Kumalo, from Johannesburg is running a farm on top of a building in Sandton. It is said to be Sandton's first hydroponic rooftop far. She says her hope is to have more farms and make the concrete jungle more green. See the video below to learn more about this farm.
South Africa: "Sandton's first hydroponic rooftop farm"