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Contact: Elizabeth K. Gardner
Purdue University

Well Pad

Caption: This shows a well pad in southwestern Pennsylvania. A Purdue and Cornell study found high levels of the greenhouse gas methane above shale gas wells during the drilling stage -- a production point not thought to be a significant emissions source.

Credit: (Photo courtesy of Dana Caulton)

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Related news release: 'Problem wells' source of greenhouse gas at unexpected stage of natural gas production

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