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A: If we really have nothing to eat, it is inevitable to ensure food security in advance. It is impossible to do polymer materials first. But from an objective point of view, this worry is superfluous. I will share several sets of data for you.
Global corn production is 1 billion tons / year, 80% of which is used for feed and fuel, fuel ethanol is burned about 50%, feed is about 30%. It is only about 10% used in food, about 100 million tons. Assume that the PLA production is 2 million tons per year, which is 6 million tons of corn, accounting for 0.6%. Our food production is over-supplied, and there are still 200 million tons of grain in China. In addition to corn, other crops, such as cassava, have an annual global production of 300 million tons, 60% of which is used in industry, not human food. These sets of data are sufficient to demonstrate that the use of plant starch to produce polylactic acid materials does not affect the food industry.
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