How can one determine whether a plastic bag is a biodegradable plastic bag in daily life?

Look at the exterior of the plastic bag

You can check plastic bags for impurities in a well lit area on a daily basis. Even if a low-quality plastic bag is transparent, there may be many small black spots inside, and even cracks can be seen on the bag.

Look at the touch of the plastic bag

Put the plastic bag into water. If it sinks to the bottom, it indicates inferior material, while floating on the water surface indicates better quality. A good plastic bag should feel flat and smooth. If it feels rough, it is not recommended to use it.

Smell the smell of plastic bags

Poor quality plastic bags can clearly smell a disgusting odor, while good materials will not have a special smell.

Listen to the sound of plastic bags

A high-quality plastic bag makes a buzzing sound when shaken.