These polymers are made from quickly regenerating feedstocks (plants, wastes, and residual gases) and will biodegrade at the end of their useful lives. While some of these polymers breakdown only in certain conditions, PHAs degrade in the majority of natural habitats, including the oceans.
These polymers are generated from quickly regenerating feedstocks (mainly plants), but they do not biodegrade after they are no longer required. The molecular structure of these polymers is identical to that of their fossil-based counterparts.
This category includes the vast majority of today's polymers. They are made of ancient fossil carbon (derived from petroleum) and will not decompose.
These polymers are made from ancient fossil carbon (usually from petroleum), but their molecular structure allows them to be biodegradable.