 With regard to definition 2, an oxo-biodegredable polyolefin plastic file (e.g.polyethylene, polypropylene, and all their combinations), incorporating a catalyst that ensures fast oxidative cleavage of its macromolecules, will become biodegradable by cell-mediated phenomena (bacteria and fungi) in the environment and much more quickly than conventional ordinary plastic.Degradation is a process that takes place in almost all materials.