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In this picture taken on April 9, 2021, Rooftop Republic urban farmers harvest vegetables grown on a rooftop farm at the top of the 150-metre tall Bank of America tower in Hong Kong. - More than 60 farms have sprouted across Hong Kong since 2015 -- on decommissioned helipads, shopping mall rooftops and public terraces -- thanks to initiatives like Rooftop Republic, a local social enterprise which promotes urban farming. - TO GO WITH AFP STORY HongKong-China-lifestyle-environment-farming by Celia CAZALE (Photo by Anthony WALLACE / AFP) / TO GO WITH AFP STORY HongKong-China-lifestyle-environment-farming by Celia CAZALE (Photo by ANTHONY WALLACE/AFP via Getty Images)

In this picture taken on April 9, 2021, Rooftop Republic urban farmers harvest vegetables grown on a rooftop farm at the top of the 150-metre tall Bank of America tower in Hong Kong. - More than 60 farms have sprouted across Hong Kong since 2015 -- on decommissioned helipads, shopping mall rooftops and public terraces -- thanks to initiatives like Rooftop Republic, a local social enterprise which promotes urban farming. - TO GO WITH AFP STORY HongKong-China-lifestyle-environment-farming by Celia CAZALE (Photo by Anthony WALLACE / AFP) / TO GO WITH AFP STORY HongKong-China-lifestyle-environment-farming by Celia CAZALE (Photo by ANTHONY WALLACE/AFP via Getty Images)