Did you know that cigarettes are one of the most harmful pollutants on the planet And we aren't just taking about the toxic nicotine, it's the butts which cause a lot of damage. They are actually worse than plastic bottles and straws. Here's more reason to ban cigarettes - butts can take more than 10 years to degrade. And the toxins left behind, even after the butts are gone, include harmful nicotine, lead, and arsenic.