A new EPA study of hydraulic fracturing is expected to provide a broad look at the natural gas drilling process, including injection spills, leaks and water contamination incidents.
Legislation calls for a new review of a 2004 report in which the Environmental Protection Agency gave its blessing to the controversial drilling method.
Legislators who've been pushing a bill to regulate a controversial natural gas drilling process are now calling for further scientific study, a change in tack made under intense lobbying pressure and after a personal request from Colorado's Democratic governor.