Indoor air is riskier than outdoor air. So what do you do if it’s really hot out?

Despite its critical role in our daily lives, air is not something most of us spend a great deal of time thinking about. It’s that easy to take for granted. Unlike water, we don’t need to fill up a cup to consume it. If some escapes from the room, more will find its way back in, whether we open the door or not.

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