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elements into account to〓 create the "perfect environment" for growth. A tightly controlled env〓ironment not only maximizes growth potential, but also allows scientist〓s to create food that suits specific needs, Zheng said. For example, s〓cientists can lower the amount of potassium 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 the8

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 wavelengths of light across a wide spectr〓um from ultraviolet to infrared. Plants are "picky eaters 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 〓change or create LED lights that shine at that specific intensity and s〓pectrum, saving lotn

s of energy in the process," he added. While blue a〓nd red lights are the "meat and potatoes" of a plant's growth, scientisf

otany. The 〓second-generation plant in Anxi can produce 1.5 tons of vegetables, suc〓h as lettuce and cabbage, a day. At full capacity, when the energy cos〓t is neglected, it can produce 1,000 tons of leafy greens a year in the〓ory, according to Li. "The high productivity is mainly because we try t〓o emulate the most ideal natural conditions for plant growth, and use t〓echnologies to cater to their every needs." Before entering the plant 

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, scientists discovered that adding s〓ome green light to the red-blue recipe could help some vegetables grow,〓 while too much green light puts plants into hibernation, although this〓 is helpful for the plant's nutrient build up. "Mimicking sunlight usi〓ng 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, water4

and carbon dioxide, it 〓still needs some trace elements from soil or fertilizers to be healthy.〓 In the case of plant factories, hydroponic nutrient solutions infused 〓with 17 essential elements ranging from nitrogen to calcium have replac〓ed the tilted soil. "The content of the nutrient solution is also tail〓ored to suit the plant's specific needs," said Pei Kequan, a research d〓irector at the factory. Unlike the trace elements from fertilizers, whi〓ch are locked in big compound molecules, "the nutrients in the solution〓 are broken into small molecules, meaning the plant can absorb them eas〓ier and grow faster while keeping its nutrient value and taste". It ta〓kes about 20 days for a sapling to reach maturity in the lab, but 40 to〓 60 days in a conventional farm. This means scientists can reap more th〓an a dozen harvests of produce each year, compared with one to two harv〓estse

from a conventional farms, depending on the weather conditions, he〓 said. Moreover, scientists at the facility have built T

dd the missing nutrient and reuse the solution withou〓t needing to make a new batch, thus reducing the cost. "We go to great〓 length to study and cater to our plant's most fundamental needs, makin〓g sure they could grow under the best conditions," Pei said. "In a way,〓 the plants are the kings, and we are all its servants." It's high tim〓e we find a sustainable and green way to protect our food security."BEIJING, Feb. 13 (Xinhua) -- China Z

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teration of food, the CFDA〓 said.The plans also said that no less than 300 food safety standar〓ds and about 3,050 drug saf2 Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

will tighten regulation and revis〓e standards on an extensive range of food and drugs, according to t〓he national food and drug watchdog Monday.The State Council has rec〓ently issued national safety plans on food and drug safety for the 〓13th Five-year Plan period (2016-2020), calling for improved superv〓ision and safety net, said the China Food and Drug Administration (〓CFDA).The plans require whole-process control and whole chain regul〓ation on food and drugs, especially on source control and risk prev〓ention. Food tests meeting quality standards should be up to 97 per〓cent.An inter-departmental mechanism for food and drug safety will 〓be improved as a better deterrent against offenses.A total of 1.1 m〓illion cases concerning food safety have been handled nationwide fr〓om 2013 to 2015. Violators will receive severe punishment in future〓, such as criminal liability for the adul6

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