While there has been minor success with this, there is also the problem of how long the plastic takes to degrade, as many biodegradable products take a long time to break down.
雖然在這方面取得了輕微的成功，但也存在塑料花費多少時間來降解的問題，因為許多可生物降解的產品需要很長時間才能分解。