A. eutrophus naturally occurring polyhydroxyalkanoates (PHA). PHAs are a large group of polymers biodegradable for use in the manufacture of plastic biodegradable. Specifically, A. eutrophus produces Polyhydroxybutyrate (PHB), the bacterium used as a way to store carbon when it is in an environment in which this element is abundant, but where few other essential nutrients such as nitrogen or phosphorus . The gene of A. eutrophus for production of PHB was cloned into plants by techniques of genetic engineering .