File photo of anti-fracking rally at the state legislature in Albany, New York
Anti-fracking protestors demonstrate at the state legislature in Albany, New York in this January 24, 2012 file photo. Large earthquakes thousands of miles away can trigger swarms of small quakes near wastewater-injection wells like those used in oil and gas recovery, scientists reported July 11, 2013. The recent surge in U.S. oil and gas production -- much of it using vast amounts of water to crack open rocks to release natural gas, as in fracking --has been linked to an increase in small to moderate induced earthquakes in Oklahoma, Arkansas, Ohio, Texas and Colorado. Picture taken January 24, 2012. REUTERS/Les Stone/Files (UNITED STATES - Tags: ENVIRONMENT ENERGY)
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