A Carnegie Mellon University study concludes that climate-change-producing pollution from Marcellus Shale Gas development and combustion is significantly lower than that from the mining and burning of coal. According to the study, published Aug. 5 in the peer-reviewed "Environmental Research Letters," greenhouse gas emissions from Marcellus gas used to generate electricity would be 20 percent to 50 percent lower than those for coal. "Shale gas is better than coal when it comes to electricity generation," said Paulina Jaramillo, an assistant research professor in CMU's Engineering and Public Policy Department and one of six authors of the study.
"We looked at the life cycle of gas and coal emissions and even though methane emissions form gas are higher than from coal, the combustion emissions from coal really overwhelm them."
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