Summary:

- The article discusses a study that found indoor air pollution can be caused by terpenes, which are organic compounds found in essential oils and scented products.
- Researchers found that terpenes can react with ozone to produce harmful secondary pollutants, including formaldehyde, which can negatively impact indoor air quality and human health.
- The study suggests that the use of scented products should be minimized in indoor environments to reduce exposure to these potentially harmful pollutants.