Thank you for the check. > PE and PP are made from ethene and propene, which are indeed byproducts of fuel refining. When we're talking about things like plas

Thank you for the check. > PE and PP are made from ethene and propene, which are indeed byproducts of fuel refining. When we're talking about things like plastic bags and wraps, aren't we talking about PE/PP? > Even if there were any waste products from fuel refining, they would certainly not be vented. They'd be burned as fuel. This makes a lot of sense. But what if a refinery is not equipped to do this? What if the refinery is in a place with poor or non-existant environment regulation/enforcement? > But demand far outstrips supply now, so these are now made on purpose. This is the kicker. So how do we make PP/PE when supply of precursors from crude refinement is not sufficient? > PS is made ... PET is made from ... I shouldn't have used the word extruded, I guess? I was thinking more about PE/PP.