Common silicones from engine oil and cosmetics are far more prevalent in the atmosphere than expected, making up to 4.3% of organic aerosol mass. This stable pollutant is now omnipresent in urban and rural air, potentially impacting both human health and cloud formation.

Common silicones from engine oil and cosmetics are far more prevalent in the atmosphere than expected, making up to 4.3% of organic aerosol mass. This stable pollutant is now omnipresent in urban and rural air, potentially impacting both human health and cloud formation.