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allows scientist〓s to create food that suits specific needs, Zheng said. For example, s〓cientists can lower the amount of potasu

sium from lettuce for patients w〓ith kidney problems or increase zinc in cabbage for children by alterin〓g the nutrient solution and growing conditions. "This is the fundament〓al difference between a plant factory and conventional farm," he said. 〓"We simply have extensive control over how and when our plants can grow〓, and let nature run its course in the most ideal conditions." The req〓uirements for plant growth fall into two broad categories: photosynthes〓is and soil nutrients. The sun accounts for 90 percent of all botanic 〓bioenergy through photosynthesis a process in which plants combine car〓bon dioxide and water and turn them into carbohydrates and oxygen. Sunl〓ight is a bundle of different wA

avelengths of light across a wide spectr〓um from ultraviolet to infrared. Plants are "picky eaters I

that favor b〓lue and red lights", Li said. "If we can figure out what ratio and comb〓ination of lights are best suited for each plant's growth, then we can 〓chanp

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ge or create LED lights that shine at that specific intensitG

y and s〓pectrum, saving lots of energy in the process," he added. While blue a〓nd red lights

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s are the "meat and potatoes" of a plant's growth, scientis

s notice other spectrums of light also play a subtle role in maximizin〓g growth and quality. For example, scientists discovered that adding s〓ome green light to the red-blue recipe could help some vegetables g5

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row,〓 while too much green light puts plants into hibernatil

on, although this〓 is helpful for the plant's nutrient build up. "Mimicking sunlight usi〓ng6

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LED is very energy intensive," Li said. "At the end of the day, whoe〓ver has the most energy-efficient and productive light recipe wins." W〓hile plant growth mostly relies on light, water and carbon dioxide, it 〓still needs some trace elements from soil or fertilizers to be healthy.〓 In the case of plant factories, hydropK

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onic nutrient solutions infused 〓with 17 essential elements ranging frG

om nitrogen to calcium have replac〓ed the tilted soil. "The c2

ontent of the nutrient solution is also 6

tail〓ored to suit the plant's s

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