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The Marcellus Shale is the largest natural gas deposit in the U.S. and rapid development of this resource has raised concerns about regional air pollution. A field campaign was conducted in the southwestern Pennsylvania region of the Marcellus Shale to investigate the impact of unconventional natural gas (UNG) production operations on regional air quality. Whole air samples were collected throughout an 8050 km(2) grid surrounding Pittsburgh and analyzed for methane, carbon dioxide, and C1-C10 volatile organic compounds (VOCs). Elevated mixing ratios of methane and C2-C8 alkanes were observed in areas with the highest density of UNG wells. Source apportionment was used to identify characteristic emission ratios for UNG sources, and results indicated that UNG emissions were responsible for the majority of mixing ratios of C2-C8 alkanes, but accounted for a small proportion of alkene and aromatic compounds. The VOC emissions from UNG operations accounted for 17 ± 19% of the regional kinetic hydroxyl radical reactivity of nonbiogenic VOCs suggesting that natural gas emissions may affect compliance with federal ozone standards. A first approximation of methane emissions from the study area of 10.0 ± 5.2 kg s(-1) provides a baseline for determining the efficacy of regulatory emission control efforts.

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The current study explores the videos of eight popular transgender YouTubers. A content analysis was conducted to examine the themes present in videos, the specific issues discussed, and the educational value for viewers. In particular, the present research was interested in the amount of videos that contain transgender-specific content, and in the types of issues—both general and in terms of gender transition—about which transgender YouTubers converse. Videos were also analyzed in relation to self-identified type of transgender individual (e.g. male-to-female [MTF] or female-to-male [FTM]), and significant differences were found in both the amount of transgender-specific content as well as the educational value of videos. This article positions transgender YouTube content as an educational tool that can both help serve as guidance for transgender viewers, as well as increase mainstream audiences’ understanding of transgender persons, subjects, and struggles.