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

看塑料袋外表

Look at the exterior of the plastic bag

日常可在光线好的地方查看塑料袋是否有杂质。劣质的塑料袋即便是透明的，其内里也可能存在很多小黑点，甚至会在袋子上看到裂口。

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.

看塑料袋摸起来的手感

Look at the touch of the plastic bag

将塑料袋放入水中，若沉底则说明是劣质材料，漂浮在水面则质量较好。好的塑料袋摸起来应该是平整、光滑的，如若手感比较粗糙，则不建议使用。

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.

闻塑料袋气味

Smell the smell of plastic bags

劣质的塑料袋可以明显闻出恶心的气味，好的材质闻起来不会有特殊气味。

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

听塑料袋声音

Listen to the sound of plastic bags

质量较好的塑料袋抖起来有嗡嗡的声响。

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