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What is plastic made out of and how is it made?

The things that go into plastics are various products from oil refineries (hydrocarbons) and some other elements, most often chlorine (which is made from salt). Plastics are generally made through a polymerization process, where small molecules are made through a series of reactions, and then those small molecules are combined (through heat or pressure) so that they all join up forming a stable solid material. There are lots of different varieties though, which makes recycling plastics rather difficult!

Arthur Smith

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