Paper bowls are usually made from pulp or paper materials, which makes them biodegradable. Paper is made from natural fibers (such as wood pulp) that naturally break down and degrade under the right conditions. Therefore, most paper bowls can biodegrade in the right environment.

However, for paper bowls to degrade effectively, the following conditions need to be met:

1. Appropriate processing environment: Paper bowls usually need to be processed in commercial composting facilities or industrial composting systems, or in home composting. In these facilities, factors such as humidity, temperature and oxygen are favored and controlled to help decompose and degrade paper bowls.

2. Appropriate conditions and time: The rate of decomposition of paper bowls depends on many factors, including the thickness of the paper, the type of pulp, and the treatment conditions. Typically, paper bowls may take several months to several years to fully degrade.

Meanwhile, in order to ensure that paper bowls can effectively degrade and return to nature, we need to recycle and dispose of them properly without littering.