TIL the 1 billion smokers in the world contribute to the 880,000 second hand smoke deaths each year from those that do not smoke.

https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2762812#:~:text=Importance%20The%20World%20Health%20Organization,do%20not%20smoke%20each%20year.

https://www.reddit.com/r/todayilearned/comments/15mzj9v/til_the_1_billion_smokers_in_the_world_contribute/