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Understanding the Different Types of PlasticAlong with PET (#1), high-density polyethylene is one of the more often ... A durable and lightweight plastic, polypropylene ...
high-density polyethylene and low-density polyethylene (LDPE), acrylic, polypropylene, and polystyrene. All gave off methane and ethylene in the days after being exposed to sunlight, they found, but ...
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