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Science. 2018 Feb 16;359(6377):760-764. doi: 10.1126/science.aaq0524.

Volatile chemical products emerging as largest petrochemical source of urban organic emissions.

Author information

1
Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA. brian.mcdonald@noaa.gov.
2
Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO, USA.
3
Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA.
4
Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA.
5
Department of Civil and Environmental Engineering, University of California, Davis, CA, USA.
6
Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, USA.
7
National Center for Atmospheric Research, Boulder, CO, USA.
8
Department of Chemistry, Université de Montréal, Montréal, Quebec, Canada.
9
Department of Chemical and Environmental Engineering, Yale University, New Haven, CT, USA.
10
School of Forestry and Environmental Studies, Yale University, New Haven, CT, USA.
11
Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA.
12
Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA, USA.
13
Department of Civil and Environmental Engineering, University of California, Berkeley, CA, USA.

Abstract

A gap in emission inventories of urban volatile organic compound (VOC) sources, which contribute to regional ozone and aerosol burdens, has increased as transportation emissions in the United States and Europe have declined rapidly. A detailed mass balance demonstrates that the use of volatile chemical products (VCPs)-including pesticides, coatings, printing inks, adhesives, cleaning agents, and personal care products-now constitutes half of fossil fuel VOC emissions in industrialized cities. The high fraction of VCP emissions is consistent with observed urban outdoor and indoor air measurements. We show that human exposure to carbonaceous aerosols of fossil origin is transitioning away from transportation-related sources and toward VCPs. Existing U.S. regulations on VCPs emphasize mitigating ozone and air toxics, but they currently exempt many chemicals that lead to secondary organic aerosols.

PMID:
29449485
DOI:
10.1126/science.aaq0524
[Indexed for MEDLINE]

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