Deborah Swackhammer a professor at the U of Minnesota recently gave a lecture in 2012 at the Institute for Occupational Medicine's conference on the health impacts of shale gas extraction. The video of her talk is available below. Her talk focuses primarily on the water use issues. This covers the water used in the fracking process and the water used to wash the sand. The heavy ground water use may also impact the surface water levels possibly drying up lakes and streams. She also mentions categories of health effects for many chemicals used in the fracking process and lays out concerns especially with chemicals known to be endocrine disruptors.
http://www.advances.umn.edu/2012/05/hydrofracking/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+publichealthlectures+%28Public+Health+Lectures%29
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