by James A. Pardo and Brandon H. Barnes The public and regulators alike continue to scrutinize the impact of hydraulic fracturing on water resources – e.g., possible contamination of drinking water; volume of water used; and disposal of used fracing wastewater.  These water issues have dominated the debate for some time, overshadowing concerns that some have raised about potential impacts from an air quality perspective. Recent events, however, indicate that air emissions are likely to become a fracing issue. On April 3, Henry Waxman (D-CA) and Diana DeGette (D-CO) wrote to Environmental Protection Agency (EPA) Administrator Lisa Jackson asking the agency to consider a recent Colorado School of Public Health (CSPH) study linking air emissions from hydraulic fracturing activities to increased risks of cancer and non-cancer illnesses.  The letter comes one day after EPA delayed publication of final rules for air emissions from oil and gas...

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