The Washington, D.C.-based Wilderness Society analyzed drilling plans and said oil and gas exploration was poised to push into some of the West's most environmentally sensitive areas. That includes plans to drill in Colorado's Roan Plateau, the Upper Green River Basin in Wyoming and Montana's portion of the Powder River Basin.

Democrats, in taking back the House from Republicans, promised to tilt the nation's energy policy away from oil drilling and toward efficiency and cleaner sources of energy. This week their pledge will be put to the test