obsolete manufactured plastic true OBSOLETE A (portion of) plastic is an (portion of) anthropogenic environmental material including any of numerous organic synthetic or processed materials which are primarily composed of thermoplastic or thermosetting polymers of high molecular weight. This term has been replaced by "synthetic plastic" as part of a more coherent set of classes as part of the SDG14.1.1 project (see https://github.com/EnvironmentOntology/envo/projects/17)