The BLM did not consider oil shale leasing and development under any alternative due to the absence of known, commercially exploitable resources and lack of anticipated leasing and development. The BLM does not anticipate impacts to oil shale leasing and development. However, closing large areas to mineral leasing or applying NSO restrictions on large areas may adversely affect potential oil shale leasing in the Planning Area if demand were to arise. Major and moderate constraints on mineral leasing, geophysical exploration, and minerals development also may adversely impact potential oil shale leasing.