The study[0] in ScienceMag this article revolves around seems to focus on on Volatile Chemical Products (VCP's) derived from petrochemicals. From the abstract:

The study[0] in ScienceMag this article revolves around seems to focus on on Volatile Chemical Products (VCP's) derived from petrochemicals. From the abstract: >We show that human exposure to carbonaceous aerosols of fossil origin is transitioning away from transportation-related sources and toward VCP's. and from the study itself: >Most organic compounds in soaps and detergents dissolve in water and end up in sewer systems (20), with negligible amounts emitted from wastewater treatment plants (21). And my takeaway is: e.g. organic compounds in the soaps used for dish-washing and showering don't VOC-off, but instead are carried away by the drain and are almost entirely captured in wastewater treatment. So, when this article mentions soaps, I'd hazard to restrict that to spray soaps derived from petrochemicals. [0]http://science.sciencemag.org/content/359/6377/760.full http://science.sciencemag.org/content/359/6377/760.full