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<p>of <a href="page.php?w=ethylene">ethylene</a>, with various values of n. It can be <a href="page.php?w=Low-density_polyethylene">low-density</a> or <a href="page.php?w=High-density_polyethylene">high-density</a> and many variations thereof.  Its properties can be modified further by crosslinking or copolymerization.  All forms are nontoxic as well as chemically resilient, contributing to polyethylene's popularity as a multi-use plastic. However, polyethylene's chemical resilience also makes it a long-lived and decomposition-resistant pollutant</p><p>
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