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DENVER, CO - FEBRUARY 24: Anti-fracking activists (front of small table) wait to deliver a health compendium to attendees Oil and Gas Task Force meeting at the Colorado Convention Center February 24, 2015. (Photo by Andy Cross/The Denver Post via Getty Images)

DENVER, CO - FEBRUARY 24: Anti-fracking activists (front of small table) wait to deliver a health compendium to attendees Oil and Gas Task Force meeting at the Colorado Convention Center February 24, 2015. (Photo by Andy Cross/The Denver Post via Getty Images)