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Is Ambient PM 2.5 Sulfate Harmful? Schwartz and Lepeule Respond

Schwartz, Joel ; Lepeule, Johanna

Environmental Health Perspectives, 2012, Vol.120(12), p.a454-a455 [Peer Reviewed Journal]

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  • Title:
    Is Ambient PM 2.5 Sulfate Harmful? Schwartz and Lepeule Respond
  • Author/Creator: Schwartz, Joel ; Lepeule, Johanna
  • Subjects: Correspondence
  • Is Part Of: Environmental Health Perspectives, 2012, Vol.120(12), p.a454-a455
  • Description: Grahame and Schlesinger make two arguments against the conclusions of our paper (Lepeule et al. 2012). Regarding their first point, we argued that if sulfates are non-toxic—and the fraction of particles that are sulfate has declined substantially since the 1970s—one would expect a slope to have increased over time because the non-toxic fraction of PM (particulate matter) mass was declining. Grahame and Schlesinger make no concrete argument against it, other than to say that it conflicts with the approaches we advocated in another paper (Mostofsky et al. 2012). This is not true.
  • Identifier: ISSN: 0091-6765 ; E-ISSN: 1552-9924 ; DOI: 10.1289/ehp.1205873R ; PMCID: 3548288