Polystyrene (PS) is a petroleum‐based plastic made from styrene (vinyl benzene) monomer.Sinceitwasfirstcommerciallyproducedin1930,ithasbeenusedforawiderange of commercial, packaging and building purposes. In 2012, approximately 32.7 milliontonnesofstyrenewereproducedglobally,andpolystyreneisnowaubiquitoushousehold…