In general, PP (polypropylene) has a lower carbon footprint than APET (amorphous polyethylene terephthalate). This is because the production process of PP requires less energy and emits fewer greenhouse gases compared to APET. PP is a byproduct of the refining of crude oil, and it can be produced using less energy than other plastics. Additionally, PP has a higher melting point than APET, meaning it can withstand higher temperatures during processing, which reduces energy consumption. APET, on the other hand, requires more energy to produce and has a higher carbon footprint due to the energy-intensive process of creating the polymer from fossil fuels.

Overall, while both PP and APET can be recycled, PP is generally considered to be more environmentally friendly due to its lower carbon footprint

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