Environmentalists and the energy industry have fought decisive battles over fracking in New York, Oklahoma and Texas, but the outcome is still unclear in Colorado.
A ballot fight could be shaping up for Colorado's 2016 election.
A task force convened by Gov. John Hickenlooper tried to find a compromise in the debate over how much the industry should be regulated, but it didn't go far enough for fracking critics.
Karen Dike of Coloradans Against Fracking says the panel did little to address fracking's potential health and environmental effects.
She won't say if the group plans to put measures on the 2016 ballot, but she doesn't rule it out.
Frank McNulty, a Republican former state lawmaker who sponsored a pro-industry ballot measure in 2014, expects opponents to turn to the voters.
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