0000950129-08-003776 11-K 2 20071231 20080630 20080630 WASTE MANAGEMENT INC 0000823768 4953 731309529 DE 1231 11-K 34 001-12154 08925373 1001 FANNIN STREET STE 4000 HOUSTON TX 77002 7135126200 1001 FANNIN STREET SUITE 4000 HOUSTON TX 77002 USA WASTE SERVICES INC 19920703 11-K 1 h58012ae11vk.htm FORM 11-K - ANNUAL REPORT EX-23.1 2 h58012aexv23w1.htm CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM