The PAMA has since been modified to include the reduction of stack and fugitive emissions to meet air quality objectives, certain additional pollution controls and the protection of public health including the reduction of lead levels in blood and special health programs for children and expectant mothers.
12.
The most comprehensive study of methane leakage from shale gas to date, initiated by the Environmental Defense Fund and released in the Proceedings of the National Academy of Sciences on 16 September 2013, finds that fugitive emissions in key stages of the natural gas production process are significantly lower than estimates in the EPA's national emissions inventory.
13.
The most comprehensive study of methane leakage from shale gas to date, initiated by the Environmental Defense Fund ( EDF ) and released in the Proceedings of the National Academy of Sciences on 16 September 2013, finds that fugitive emissions in key stages of the natural gas production process are significantly lower than estimates in the EPA s national emissions inventory ( which are already quite low ).
