Data from comparable surveys of residents in the Marcellus Shale region of Pennsylvania conducted in 2009 and 2012 are analyzed to ascertain changes in public views over time. The proportions of residents indicating they knew very little or nothing about the economic, social, and environmental impacts of gas drilling declined sharply. Further, residents increasingly formed opinions about the possible costs and benefits of developing the industry and whether they opposed or supported developing the gas industry. The proportions of respondents expressing various concerns about possible negative environmental impacts of drilling increased. However, most residents supported developing the industry and there was little change in that support over the survey period.

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