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Plastic bag is a bag made of plastic (commonly used plastics include polypropylene, polyester, nylon, etc.) as the main raw material. It is an indispensable item in people's daily life and is often used to hold other items. It is widely used because of its low cost, extremely light weight, large capacity, and convenient storage. However, it is banned from production and use in some countries because of the extremely long degradation cycle and difficult handling of plastic bags.