Cigarette butts are the most littered item on the planet. People toss out an estimated 4.5 trillion cigarette butts each year, and that number may double by the end of 2025 as e-cigarette use grows.

Cigarette butts with filters are the most commonly littered item worldwide, with a staggering 4.5 trillion of them tossed into the environment each year. This is a huge problem; many end up on beaches ...