How long does it typically take for plastic to decompose?

Plastic is known for its durability and resistance to natural degradation. The decomposition of plastic in the environment can take a significant amount of time, with estimates commonly ranging from several decades to several centuries. While there is a great degree of variability depending on the type of plastic and environmental conditions, many studies suggest that typical plastics can take around 450 years to decompose completely.

This timeframe is based on the nature of plastics, which do not readily break down into natural materials and can persist in the environment for extremely long periods. Over those centuries, plastic breaks down into smaller particles but does so without fully decomposing into materials that can be reabsorbed into the ecosystem, leading to ongoing environmental concerns.

In contrast, the other timeframes provided in the choices fall short or exceed the general consensus on the decomposition period for most plastic products. The 100-year and 250-year estimates are generally considered too brief, while 600 years may represent an estimate for particular types of plastics or a more conservative view but does not align with the widely accepted average. Understanding these decomposition timelines is essential for comprehending the impact of plastic waste on ecosystems and the importance of effective waste management and recycling practices.