All the processes involved are engineered to be efficient. Irrigation, for instance, relies on captured rainwater. This is cleaned and recycled, but only 5% gets used up by each harvest － and most of that as the water-content in the plants themselves. Ventilation is also a closed loop, harvesting surplus heat from the LEDS while managing humidity and oxygen levels.
Horticulture － Growing brighter The Economist August 31 2019 園芸の最先端技術
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