
Indoor vape emissions form a dangerous chemical cocktail, study warns
A December 2025 study in Environmental Science & Technology finds that aerosols from e-cigarettes can become chemically reactive after lingering in indoor air, forming organic hydroperoxides and radicals; ultrafine particles concentrate redox-active metals like arsenic, tin, and lead, creating a “chemical cocktail” that may raise respiratory health risks for bystanders. The researchers urge treating vaping emissions like secondhand smoke and reducing indoor exposure, aligning with global policy debates and bans on vaping.












