The biggest drawback of vertical farming is the high cost of the electricity required to run the large number of LEDS. This has meant that production has been commercially viable for high-value, perishable produce only, such as salad leaves and herbs. That, nevertheless, is a market not to be sniffed at. But for a broader range of produce, it can prove too expensive. In 2014 Louis Albright, an emeritus professor of biological and environmental engineering at Cornell University in America, calculated that a loaf of bread made from wheat grown in a vertical farm would be priced at about $23.
Horticulture － Growing brighter The Economist August 31 2019 園芸の最先端技術
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