http://www.manufacturing.net/news/2016/10/why-shale-revolution-not-epa-drove-decline-coal?et_cid=5612993&et_rid=45614407&location=top&et_cid=5612993&et_rid=45614407&linkid=http%3a%2f%2fwww.manufacturing.net%2fnews%2f2016%2f10%2fwhy-shale-revolution-not-epa-drove-decline-coal%3fet_cid%3d5612993%26et_rid%3d%25%25subscriberid%25%25%26location%3dtop
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