degradation

这些细菌能加速有机物的降解过程。

These bacteria speed up the ___degradation of organic matter.

塑料垃圾正在导致海洋生态系统退化。

Plastic waste is causing ___degradation effects on marine ecosystems.

过度使用化肥导致了土壤质量的退化。

Excessive use of fertilizers caused the ___degradation of soil quality.