What takes 100 years to decompose?

What Really Happens to Our Trash?

Ever tossed an old battery in the bin and wondered where it goes? Unlike food scraps or paper, some everyday items linger far longer than we think. Take batteries, for example—they can take up to 100 years to break down. That means a single battery you throw away today could still be sitting in a landfill when your grandchildren are adults.

Our modern convenience comes at a cost. While leather shoes decompose in about 40 years, that’s still decades longer than many realize. And then there are the real offenders: plastic bottles and disposable diapers, each taking an estimated 450 years. An aluminum can? Around 250 years. But perhaps most shocking is the plastic bag, which can persist for a full millennium—longer than the Great Wall of China has stood.

These numbers aren’t just trivia—they’re a wake-up call. Every item we discard carries a timeline, often stretching far beyond our own lifetimes. As cities grow and consumption rises, landfills swell with materials that were designed for short use but built to last. The battery in your old flashlight or remote might seem harmless, but multiply that by millions of households, and the impact adds up fast.

The truth is, decomposition isn’t just about time—it’s about space, pollution, and responsibility. As awareness spreads, more people are turning to reusable alternatives, proper recycling, and mindful consumption. Knowing how long waste lingers makes it easier to understand why small choices—like using a metal water bottle instead of plastic—can make a big difference over time.

So next time you reach for something disposable, ask yourself: is this worth 100 years of aftermath?