“…Green chemistry, first coined in the late 1990s, was extended to the field of polymers as “green polymer chemistry”, 1,2 referring to the use of a series of strategies that minimize or eliminate the utilization or generation of hazardous materials in the manufacture of polymer materials. Enzymes are biocatalysts, including six main types: oxidoreductases, transferases, hydrolases, lyases, isomerases, and ligases, 3,4 and can catalyze all metabolic reactions in vivo for maintaining “living life” in a green way. 5 For example, natural polymers are produced naturally under the catalysis of enzymes, obtained or extracted from nature (living organisms), which may contribute promisingly to ecological sustainability.…”