Environmental impacts associated with missile training and testing on McGregor Range are related mostly to debris recovery. Tactical air defense training for the United States Army is dependent on the continued withdrawal of McGregor Range lands. The land withdrawal limits Bureau of Land Management use for multiple use purposes in areas where military activities are concentrated; but, without the withdrawal, significant social, economic, and cultural impacts would occur. Adverse effects are continued soil erosion and disturbing vegetation and wildlife. Significant are the adverse impacts of military activities on archeological and historical sites. There is also loss of revenue from limiting the expansion of the grazing program of the entire range.