It's toxic, literally.

I'm shocked when I visit EU countries. They are quick to regulate anything and everything, from fuel to food to drugs, and in contrast with the U.S. they act on the premise of something needing to be proven safe before authorizing it, as opposed to the need to be proven harmful to be banned like in the States.

Yet you see people smoking everywhere in streets and cafes, even young parents pushing a stroller with one hand and smoking with the other.

Some cities' streets are literally covered in carpets of cigarette butts. Paris, Rome...