Is it better to use recycle plastic yarns or nylon yarns?

In my opinion it is better to use nylon yarns. Plastic has a self life of about 500 years and nylon has a self life of about 50 years. Also plastic recycle yarns takes  more energy to produce than producing nylon filament yarns. Since nylon by nature has strong tensile strength unlike cotton or hemp I choose to use nylon as a way to minimize environment pollution and to maximize the life span of the bags I create. 


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