At least ideally, every second of your life you’ll have access to air at any given moment. There are some that forgo this gift, like astronauts or deep sea divers, but in all, that sliver of the population is vanishingly small. Most people prefer breathing air as usual. Which is to say: every waking and sleeping moment of every day of their entire lives.
It’s precisely because of its abundance that air can often be taken for granted. The simple fact of the matter is: some of it’s good, and some of it’s bad. And it’s not always so easy as you might think to know what kind of quality you’re getting.
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