The term for substances that cannot be decomposed by natural processes is persistent pollutants or non-biodegradable substances. These materials, such as certain plastics, heavy metals, and some chemicals, resist breakdown in the environment, leading to accumulation and potential harm to ecosystems. Their persistence can impact soil, water, and wildlife, causing long-term ecological and health issues. Addressing the challenges posed by persistent pollutants requires the implementation of effective waste management, recycling, and environmental protection strategies to mitigate their effects.