Biodegradable Polymers: These are the polymers which get decomposed under aerobic or anaerobic conditions, as a result of the action of microorganism/enzymes. The materials develop it like starch, cellulose and polyesters.

The common examples of aliphatic biodegradable polymers are polyglycolic acid $\left(\mathrm{PGA}\right)$, Polyhydroxybutyrate $\left(\mathrm{PHB}\right)$, Polyhydroxy butyrates-co-beta hydroxyvalerate $\left(\mathrm{PHBV}\right)$, Nylon-$2$-nylon-$6$.

Here, biodegradable polymer is :