Pollution. Air pollution. Southwest Attempts at control in Four Corners area fails. Post Mr 31, 1972 p.80 Four Corners pollution menacing Mesa Verde National Park. RMN Ap 9, 1972 P 5 EPA study says air in southwest endangered. Post Ap 30, 1972 P-39 Ute Indians given $200,000 by Dept. of labor to monitor pollution in coal-burning Four Corners power plants. RMN S 20, 1972 p.12 Denver and Four Corners region will be focus of studies by U.s. agency. Post N 1, 1979 p.3