That 'pool smell' that we're all too familiar with comes from that chemical that is made from the reaction between urine and chlorine. Chlorine itself is odorless.
Basically every pool everywhere has been peed in.
Edit: Doh, it says this in the article. I still like posting without reading. Makes me feel more smarter.
That makes it that much better like than it already is.....don't it?
Lol