Went to market today. Talked to customer in line behind me. "as one human to another, do you know that we are not meant to breath our own carbon dioxide for long periods of time, we insted are supposed to exhale it and breath in oxygen"
Actual response: "I didn't know that"
My thought: How is it that after so many years on earth, humans do not understand the basic concept of the carbon dioxide and oxygen exchange that wee as humans ned.