air The air we breathe is something we all take for granted as human beings. We never have to think or worry about how to get more of it, all we have to do is breathe. There is an endless supply for all of us as long as the earth’s atmosphere remains the same.

So, what if the earth’s atmosphere does change one day and the air we are so reliant upon ceases to exist? How long would you be able to hold your breath?

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