The coming war over Colorado oil and gas regulation is likely to see battles in courtrooms, the Legislature and on Fort Collins ballots and City Council chambers. But who will emerge as the final authority on where and how fracking can occur ? and how air and water quality concerns will affect the oil and gas industry ? is anybody's guess.

"These things are all coming together at the same time," said Kevin Bommer, deputy director of the Colorado Municipal League. "It's impossible to predict the outcome."

As Fort Collins imposed a seven-month freeze on fracking Tuesday night, some City Council members sounded ready for battle with the state, urging voters to follow their contemporaries in Longmont and ban fracking next year.

Longmont is being sued by the state for restrictive new oil and gas regulations passed last summer. The Colorado Oil and Gas Association, or COGA, sued Longmont on Monday after voters banned fracking in the city last month.

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