Scented Products Contribute to Indoor Air Pollution on Par with Traffic Fumes

By: | February 22nd, 2025

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A recent study by Purdue University has uncovered a significant yet often overlooked source of indoor air pollution: scented products. Everyday items like wax melts, air fresheners, and certain cleaning products can generate pollution levels comparable to car exhaust, raising important concerns about the air we breathe in our homes.

The Formation of Harmful Nanoparticles

The issue stems from the release of volatile organic compounds (VOCs), particularly terpenes, from scented products. These VOCs react with indoor ozone, leading to the formation of nanosized particles. These particles are especially concerning because they can penetrate deep into the lungs, potentially causing respiratory issues. The study found that their concentrations can reach levels similar to those emitted by car exhaust, gas stoves, and even traditional candles.

Health Risks and Indoor Air Quality

Inhaling these nanoparticles may pose risks to respiratory health. While further research is needed to determine long-term effects, their high concentrations are cause for concern. The study highlights that a wide range of scented products such as wax melts, air fresheners, and personal care items—contribute to this indoor pollution. Notably, even flame-free alternatives like wax melts were identified as significant sources.

This research underscores the importance of indoor air quality, which is often overlooked compared to outdoor pollution. The pleasant scents we introduce into our homes may come at a hidden cost to our health. To reduce exposure, experts recommend improving ventilation as well as minimizing the use of scented products. By making informed choices, we can create healthier indoor environments.

Nidhi Goyal

Nidhi is a gold medalist Post Graduate in Atmospheric and Oceanic Sciences.

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