This lesson looks at our homes and the steps to take to keep the air healthy and avoid chemical exposure. We explore the makeup of the air that we breathe, how to keep it clean, and how to reduce asthma triggers in our homes. We also explore what lead is and where it might be found in our homes.

• Lesson 3: Breathing Easy: Keeping the Inside of Our Homes Healthy and Clean (PDF)(28 pp, 11 MB)