What Makes Fresh Air Fresh?

The video explores the differences between outdoor and indoor air quality, highlighting that indoor air can be more polluted due to factors like pet dander, mold, and organic compounds from furniture. It discusses various methods to freshen indoor air, such as air fresheners and air ionizers, noting their limitations and potential health risks, particularly the production of ozone by ionizers. The video concludes with safer alternatives like using indoor plants or improving ventilation by opening windows.

What is a major reason why outdoor air often feels fresher than indoor air?

• Outdoor air has fewer concentrated pollutants.

• Indoor air is more humid.

• Outdoor air contains more oxygen.

• Indoor air is usually cooler.

Which of the following is NOT a common source of indoor air pollution?

• Mold

• Organic compounds from furniture

• Car exhaust

• Pet dander

How do air ionizers attempt to clean the air?

• By releasing pleasant scents

• By filtering out dust particles

• By producing negatively charged ions

• By increasing humidity

What is a significant downside of using air ionizers?

• They consume a lot of electricity.

• They are very expensive.

• They produce ozone, which is harmful.

• They require frequent maintenance.

What is a simple and effective way to improve indoor air quality?

• Installing more air conditioners

• Keeping windows closed

• Using more scented candles

• Growing indoor plants