The Pennsylvania Department of Environmental Protection has issued a news release reporting that air emissions from unconventional shale development operations are only a small part of the total air emissions in the state, and they are on the decline: "'The data show that emissions from drilling represent a small fraction of air pollution in the state, which has gone down considerably since shale gas development began in earnest several years ago,' DEP Secretary Mike Krancer said."
There will be a web-based presentation this Thursday at 2 pm regarding the findings.