Exhaust fumes?

by HolyMole @, Wednesday, June 21, 2017, 14:45 (461 days ago) @ Pam & Denny

Is this what is turning the bottom of my shoes black?

Shoes? How about your lungs?
Walk around barefoot in your house and see what Zihua air does for the bottoms of your feet!
But I'd go back in a heartbeat.

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