I recently purchased the worst smelling garbage bags yet, emitting what can only be described as an overpowering stench of portaloo liquid throughout the kitchen. As this Guardian article notes, around 4,000 chemicals are used in fragrances, the details of which remain “trade secrets” and are therefore unregulated. EWG adds that even products labeled “unscented” may contain fragrance to cover up other odors. Many are derived from petrochemicals, contributing to urban air pollution in the form of VOCs. So in addition to irritating those of us who are sensitive to smell, they’re actually bad for air quality.