SALT LAKE CITY (AP) — The Sierra Club branded a geological formation that includes portions of Utah, Colorado and Wyoming as one of six “climate disrupter” regions in the country due to its potential for major fossil fuel development. The characterization comes in a report that one oil company called inaccurate.

The environmental organization, in the report titled “Dirty Fuels, Clean Futures,” says tar sands and shale oil development in the Green River Formation would eclipse any progress made by the Obama administration’s strict new fuel efficiency standards for vehicles, the Deseret News reported Friday (http://bit.ly/1llRS5T ).