There's also people that spread seeds of various plants.
Alas, not all of them do their research. You gotta do native plants, in the right zones for them, if you want it to be something positive.
I said that to someone I used to know that would go around throwing pot seeds anywhere he was going. He said that pot is always a positive. He's an idiot, obviously, which is part of why he's someone I used to know.
Societally, he may have a point. Back in the day people could lose their property due to wild pot growing. Was this a real issue, or something we thought pre-internet? I don't know. But it is hard to take property when pot grows everywhere.
Apparently central Asia. I was mistaken, I thought it had been growing in the wild on much of the earth. Probably got that from a stoner friend 20 years ago lol
That was most likely hemp. I got fooled in Nebraska by some growing wild along a highway. My friend and I smoked a bunch and just got a headache. That's when we remembered that hemp cultivation was pretty common in the US prior to the 1900s