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Biodegradable plastics are also called biodegradable plastics. In nature, such as soil and/or sand, under specific degradation conditions, such as composting conditions, anaerobic digestion conditions, and aqueous culture fluids, degradation is caused by the action of microorganisms in nature. , And finally completely degrade into carbon dioxide (and/or) methane (and/or water) and mineralized inorganic salts of the elements contained therein and new biomass