Plastic persists in the environment for decades to centuries, depending on its polymer type and exposure conditions. Understanding how long a given mass of plastic will remain before it degrades helps policymakers and businesses set realistic waste‑management targets.
The lifetime of a plastic stock can be estimated by dividing the total mass by the effective annual loss, which is the product of the natural degradation rate and the fraction that is not reclaimed through recycling. This simple model captures the dominant processes that remove plastic from the environment.
By coupling the lifetime estimate with the carbon intensity of the plastic, we can also approximate the total greenhouse‑gas emissions associated with the material over its entire existence, providing a more complete ecological footprint.
How do I use the Plastic Lifetime Calculator?
What factors affect the lifetime of plastic in the environment?
Can this calculator predict when a specific piece of plastic will degrade?
How does recycling affect the estimated lifetime of plastic?
What is meant by ‘effective annual loss’ in this calculator?
Are there different types of plastics that degrade at different rates?
How can policymakers use this calculator?
Results are for informational purposes only and do not constitute professional advice.