Marcellus Shale drilling in Pennsylvania was responsible for just a small fraction of PA’s air pollution in 2011 according to newly released data (the first full year of data we have) from the Dept. of Environmental Protection, and from a private study by Rand Corporation (see below). How much did it contribute? PA’s shale gas industry was responsible for about 4% of total air pollution emitted by all industrial facilities in 2011.
Although the overall numbers are low, that’s not to say there aren’t concerns or things to improve…