Cigarette butts are the second most common undisposed-of litter on Earth—of the six trillion-ish cigarettes inhaled every year, it’s estimated that over 4 trillion of the butts are just tossed onto the ground, each one leeching over 700 different toxic chemicals into the environment. Let’s not focus on the fact that all those toxic chemicals are also going into people’s lungs, and instead talk about the ecosystem damage that they can do and also just the general grossness of having bits of sucke...