Incorrect again! There is a link in there to an aggregation by the Mayo clinic on MANY studies and articles that were used in forming the content of that webpage.

Secondly, are you trying to imply that Popular Science, one of the most rigorous and publicly approved science publishings would still be hosting an article from seven years ago if it had been refuted?

You, sir/madam/other: __________ are cherrypicking without taking the diligence to read the article for the stepping off point that it is. We are not in a formal debate, I do not need to provide you an ACA formatted reference list. I gave you a link that has data and a link to a lot more other data. It is not my fault you chose to stop when you saw the midwest air study.

Another source you can choose is your universities anthropology department, a simple 2 minute conversation with them will confirm that Yes, wherever humans exist, there is a cloud of shit particles.

You are being deliberately obstinate because you are incapable of admitting your stupid trollery was ill-formed and poorly envisioned. It's ok, I'll say it for you:

You're wrong, you're sorry, and you'll stop doing from now on.