As the autumn air turns crisp during October, SIU Medicine is celebrating Healthy Lung Month . To help our entire community breathe easier, we're sharing five things you can do to protect your family's lung health and function. 1. Become or remain a nonsmoker. You guessed it: Quitting smoking—or never starting—is one of the most beneficial things you can do for your lung health. Smoking directly damages the lungs, including the small air sacs inside the lungs called alveoli. The alveoli is where oxygen from the air you breathe passes into your blood. Smoking is a leading cause of lung problems