What is the biodegradable polymer?Give an example of a biodegradable aliphatic polyester.

Explanation

### Step-by-Step Solution:

1. **Definition of Biodegradable Polymer**:
A biodegradable polymer is a type of polymer that can be broken down by natural processes, typically by the action of living organisms such as bacteria, fungi, or other biological agents. This degradation leads to the polymer being converted into natural substances like water, carbon dioxide, and biomass, thus minimizing environmental pollution.

2. **Importance of Biodegradable Polymers**:
Biodegradable polymers are significant because they help reduce waste and pollution. Unlike traditional plastics, which can persist in the environment for hundreds of years, biodegradable polymers can decompose in a relatively short time frame, making them a more sustainable option.

...