TerraCycle (They even recycle cigarette butts)
I just recently heard about Terra Cycle. I´ve seen a post where somebody said she´s sending all the collected cigarette butts from a clean up to Terra Cycle.
I was wondering who actually can recycle cigarette butts, so I googled them and found out they have an office in Toronto, too.
I mailed them and they were happy to invite me to their office, show me around and answer my questions.