0000950129-01-001951 DEF 14A 1 20010518 20010405 WASTE MANAGEMENT INC 0000823768 4953 731309529 DE 1231 DEF 14A 34 001-12154 1595805 1001 FANNIN STREET STE 4000 HOUSTON TX 77002 7135126200 1001 FANNIN STREET SUITE 4000 HOUSTON TX 77002 USA WASTE SERVICES INC 19920703 DEF 14A 1 h85784def14a.txt WASTE MANAGEMENT INC