Rooftop hydroponic systems in cities produce vegetables that are cheaper and healthier than rural farms — Quartz

On a 1,600-square-foot-rooftop in Guangzhou, China, 14 hydroponic tanks produce hundreds of pounds of vegetables a year, with a potential profit of over $6,000 annually—almost twice the 2015 annual minimum wage in the city, which has one of the highest monthly minimum wages in the country. The hydroponic tanks are part of study that shows…

via Rooftop hydroponic systems in cities produce vegetables that are cheaper and healthier than rural farms — Quartz

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