Remarks on biodegradation

PHB is a biological storage material that is used by bacteria and fungi as feed source. The same is true for articles made of Biomer resins: they act as food supply to microorganisms and thus are biodegraded.
PHB serves as nutrient only, when phosphates, nitrogen, salts, humidity, and heat allow the microorganisms to grow. Such conditions are present in composts and, in part, in the soil, but not under the conditions of typical use of injection molded or extruded articles. Therefore articles made of PHB stay unharmed for years.