Workers change pipes at a horizontal gas drilling rig outside the town of Waynesburg, PA.
Battles have been brewing in other states over the controversial oil and gas extraction technique known as hydraulic fracturing -- but regulators in California are just starting to grapple with it. On Tuesday, state lawmakers grilled regulators about whether newly proposed rules would safely regulate fracking. Reporter: Lauren Sommer
Please ensure that all comments adhere to our community guidelines. We reserve the right to edit or remove comments that do not follow these guidelines.