Answer:Both of these materials emit numerous volatile organic compounds (VOCs), many of them toxic. In addition to VOCs, the printing process generates nano particles which pose a respiratory hazard. More novel applications involve the printing of biological scaffolds used to generate organs and other structures.
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Pretty sure this is true. But another thing is ranking
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the natural physical aspects and man made things come under the physical aspects man produces different physical things to satisfy his/her needs and wants
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