<PAGE>   1
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON SEPTEMBER 1, 2000

                                                     REGISTRATION NO. 333-

-------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  ----------

                                    FORM S-8
                             REGISTRATION STATEMENT
                        UNDER THE SECURITIES ACT OF 1933

                                  ----------

                             WASTE MANAGEMENT, INC.
             (Exact name of Registrant as specified in its charter)


              DELAWARE                                          73-1309529
  (State or other jurisdiction                               (I.R.S. Employer
of incorporation or organization)                         Identification Number)

                              1001 FANNIN STREET
                                  SUITE 4000
                             HOUSTON, TEXAS 77001
                                (713) 512-6200
              (Address, including zip code, and telephone number,
       including area code of Registrant's principal executive offices)

                                  ----------

                    WASTE MANAGEMENT RETIREMENT SAVINGS PLAN
                           (Full titles of the Plans)

                                  ----------

                            LAWRENCE O'DONNELL, III
                             WASTE MANAGEMENT, INC.
                               1001 FANNIN STREET
                                   SUITE 4000
                              HOUSTON, TEXAS 77002
                                 (713) 512-6200
           (Name, address, including zip code, and telephone number,
                  including area code, of agent for service)

                                  ----------

                        CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
============================================================================================================================
                                                                                        PROPOSED MAXIMUM
            TITLE OF SECURITIES               AMOUNT TO BE     PROPOSED MAXIMUM             AGGREGATE          AMOUNT OF
              TO BE REGISTERED                 REGISTERED     OFFERING PRICE PER SHARE   OFFERING PRICE    REGISTRATION FEE
============================================================================================================================
<S>                                           <C>            <C>                       <C>                 <C>
Common Stock, par value $0.01 per share.....    2,500,000(1)         $19.00(2)            $47,500,000(3)       $12,540(3)
============================================================================================================================
</TABLE>

(1)  Pursuant to Rule 416(c), this Registration Statement covers an
     indeterminate amount of interests to be offered or sold pursuant to the
     Waste Management Retirement Savings Plan (the "Plan"). See Explanatory Note
     on page one hereto.

(2)  Represents the average of the high and low prices of the Common Stock as
     reported on the New York Stock Exchange on August 30, 2000.

(3)  Computed in accordance with Rules 457(c) and (h) under the Securities Act
     of 1933, as amended, solely for the purpose of calculating the total
     registration fee. The aggregate offering price and amount of registration
     fee have been computed based on the average of the high and low prices of
     Common Stock as reported on the New York Stock Exchange on August 30, 2000.


<PAGE>   2
                                EXPLANATORY NOTE

     Effective January 1, 1999, the Waste Management Retirement Savings Plan and
the Wheelabrator-Rust Savings and Retirement Plan (the "Old Waste Plans") were
merged into the USA Waste Services, Inc. Employee Savings Plan (the "Old USA
Plan"), which then changed its name to the Waste Management Retirement Savings
Plan (the "Plan"). On July 16, 1998, the Registrant filed registration statement
on Form S-8 No. 333-59247 registering the issuance of up to 3,343,410 shares
pursuant to the Old Waste Plans, all of which shares have been issued.
Additionally, on June 2, 1995, the Registrant filed registration statement on
Form S-8 No. 33-59807 registering the issuance of up to 500,000 shares pursuant
to the Old USA Plan, all of which shares have been issued.

     This Registration Statement on Form S-8 relates to the issuance of up to
2,500,000 shares of the Registrant's common stock that may be issued pursuant to
the Plan, as the same has been amended and restated subsequent to the January 1,
1999 merger of the Old Waste Plans and the Old USA Plan.

                                     PART I

              INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS


ITEM 1. PLAN INFORMATION. *

ITEM 2. REGISTRANT INFORMATION AND EMPLOYEE PLAN ANNUAL INFORMATION. *

----------

* Information required by Part I to be contained in the Section 10(a) prospectus
is omitted from this Registration Statement in accordance with Rule 428 under
the Securities Act of 1933, as amended, and the "Note" to Part I of Form S-8.




<PAGE>   3


                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3. INCORPORATION OF DOCUMENTS BY REFERENCE.

     The following documents filed with the Securities and Exchange Commission
(the "Commission") by the Registrant are hereby incorporated by reference into
this Registration Statement:

     (a)  Annual Report on Form 10-K for the fiscal year ended December 31,
          1999.

     (b)  Quarterly Report on Form 10-Q for the quarter ended March 31, 2000.

     (c)  Quarterly Report on Form 10-Q for the quarter ended June 30, 2000.

     (d)  The description of the Registrant's Common Stock contained in the
          Registrant's Registration Statement on Form 8-A filed with the
          Commission pursuant to Section 12 of the Securities Exchange Act of
          1934, as amended (the "Exchange Act"), on July 1, 1993, as amended on
          Form 8-B filed with the Commission on July 13, 1995.

     The Plan's Annual Report on Form 11-K for the fiscal year ended December
31, 1999 as filed with the Commission is also hereby incorporated by reference
into this Registration Statement.

     All documents subsequently filed by the Registrant and the Plan pursuant to
Sections 13(a), 13(c), 14 and 15(d) of the Securities Exchange Act of 1934,
prior to the filing of a post-effective amendment which indicates that all of
the securities offered hereby have been sold or which deregisters all securities
then remaining unsold, shall be deemed to be incorporated by reference in this
Registration Statement and to be a part hereof from the date of filing of such
documents.


ITEM 4. DESCRIPTION OF SECURITIES.

     Not applicable.


ITEM 5. INTERESTS OF NAMED EXPERTS AND COUNSEL.

     Not applicable.


ITEM 6. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

     The Restated Certificate of Incorporation (the "Charter") and the Bylaws of
the Registrant provide in effect that the Registrant shall indemnify its
directors, officers, employees and agents (as well as persons serving as a
director officer, employee or agent of any of the Registrant's direct or
indirect subsidiaries) to the extent permitted by the General Corporation Law of
the State of Delaware (the "DGCL"). Sections 102 and 145 of the DGCL provide
that a Delaware corporation has the power to indemnify its directors, officers,
employees and agents in certain circumstances, as described below.

     In accordance with Section 102 of the DGCL, the Registrant's Charter
contains a provision that eliminates the personal liability of directors of the
Registrant or its stockholders for monetary damages for breach of fiduciary duty
as a director, except in cases where the director breached his or her duty of
loyalty to the Registrant or its stockholders, failed to act in good faith,
engaged in intentional misconduct or a knowing violation of the law, willfully
or negligently authorized the unlawful payment of a dividend or approved an
unlawful stock redemption or repurchase or obtained an improper personal
benefit.


                                      II-1
<PAGE>   4


     Pursuant to Subsection (a) of Section 145 of the DGCL, the Registrant's
Bylaws provide that the Registrant shall indemnify any director, officer,
employee or agent, or former director, officer, employee or agent who was or is
a party or is threatened to be made a party to any threatened, pending or
completed action, suit or proceeding, whether civil, criminal, administrative or
investigative (other than an action by or in the right of the Registrant),
against expenses (including attorney's fees), judgments, fines and amounts paid
in settlement actually and reasonably incurred in connection with such action,
suit or proceeding provided that such director, officer, employee or agent acted
in good faith and in a manner he or she reasonably believed to be in or not
opposed to the best interests of the corporation, and, with respect to any
criminal action or proceeding, provided that such director, officer, employee or
agent had no reasonable cause to believe that his or her conduct was unlawful.

     Pursuant to Subsection (b) of Section 145 of the DGCL, the Registrant's
Bylaws provide that the Registrant shall indemnify any director, officer,
employee or agent, or former director, officer, employee or agent, who was or is
a party or is threatened to be made a party to any threatened, pending or
completed action or suit by or in the right of the Registrant to procure a
judgment in its favor by reason of the fact that such person acted in any of the
capacities set forth above, against expenses (including attorney's fees),
judgments, fines, penalties and amounts paid in settlement actually and
reasonably incurred in connection with the investigation, preparation to defend
or defense of such action or suit provided that such person acted in good faith
and in a manner he or she reasonably believed to be in or not opposed to the
best interest of the Registrant, except that no indemnification may be made in
respect of any claim, issue or matter as to which such person shall have been
adjudged to be liable to the Registrant unless and only to the extent that the
Court of Chancery (or such other court in which such action or suit has been
brought) shall determine that despite the adjudication of liability such person
is fairly and reasonable entitled to indemnity for such expenses which the court
shall deem proper.

     The Registrant's Bylaws further provide that, to the extent that a
director, officer employee or agent has been successful in the defense of any
action, suit or proceeding referred to in subsections (a) and (b) of Section 145
of the DGCL or in the defense of any claim, issue or matter therein, he or she
shall be indemnified against expenses (including attorneys' fees) actually and
reasonable incurred by him or her in connection therewith. Any person seeking
indemnification as described above shall be deemed to have met the standard of
conduct required for such indemnification unless the contrary shall be
established. The indemnification provided by Section 145 of the DGCL shall not
be exclusive of any other rights to which the party seeking indemnification may
be entitled.

     Section 145 of the DGCL also provides that a corporation is empowered to
purchase and maintain insurance on behalf of a director, officer, employee or
agent of the corporation against any liability asserted against him or her or
incurred by him or her in any such capacity or arising out of his or her status
as such whether or not the corporation would have the power to indemnify him or
her against such liabilities under Section 145 of the DGCL. The Registrant has
purchased certain liability insurance for its officers and directors.

     The Registrant has entered into indemnification agreements with certain of
its executive officers and certain o its executive officers' employment
agreements contain indemnification provisions. Such agreements and provisions
generally provide that such persons will be indemnified and held harmless to the
fullest extent of Delaware law.

ITEM 7. EXEMPTION FROM REGISTRATION CLAIMED.

     Not applicable.

ITEM 8. EXHIBITS.

     The following exhibits are filed as part of this Registration Statement:

4.1   -   Restated Certificate of Incorporation (Incorporated by reference to
          Exhibit 3.2 to the Registrant's Current Report on Form 8-K dated July
          16, 1998).

4.2   -   Bylaws (Incorporated by reference to Exhibit 3 to the Registrant's
          Quarterly Report on Form 10-Q for the Quarter ended June 30, 2000).

23.1  -   Consent of PricewaterhouseCoopers LLP.

23.2  -   Consent of Arthur Andersen LLP.


                                      II-2
<PAGE>   5


24.1  -   Powers of Attorney (included on the signature page of this
          Registration Statement).

      The Registrant hereby undertakes that it will submit or has submitted the
Plan and any amendment thereto to the Internal Revenue Service (the "IRS") in a
timely manner and has made or will make all changes required by the IRS in order
to qualify the Plan.

ITEM 9. UNDERTAKINGS.

      (a)   The undersigned Registrant hereby undertakes:

      (1)   To file, during any period in which offers or sales are being made,
            a post-effective amendment to this Registration Statement:

            (i)   to include any prospectus required by Section 10(a)(3) of the
                  Securities Act of 1933, as amended (the "Securities Act");

            (ii)  to reflect in the prospectus any facts or events arising after
                  the effective date of the Registration Statement which
                  represent a fundamental change in the information set forth in
                  the Registration Statement; and

            (iii) to include any material information with respect to the plan
                  of distribution not previously disclosed in the Registration
                  Statement or any material change to such information in the
                  Registration Statement.

      Provided, however, that the undertakings set forth in paragraphs (a)(1)(i)
      and (a)(1)(ii) do not apply if the information required to be included in
      a post-effective amendment by those paragraphs is contained in periodic
      reports filed by the Registrant pursuant to Section 13 or Section 15(d) of
      the Exchange Act that are incorporated by reference in this Registration
      Statement.

      (2)   That, for the purpose of determining any liability under the
            Securities Act, each such post-effective amendment shall be deemed
            to be a new registration statement relating to the securities
            offered therein, and the offering of such securities at that time
            shall be deemed to be the initial bona fide offering thereof; and

      (3)   To remove from registration by means of a post-effective amendment
            any of the securities being registered that remain unsold at the
            termination of the offering.

      (b) The undersigned Registrant hereby further undertakes that, for
purposes of determining any liability under the Securities Act, each filing of
the Registrant's annual report pursuant to Section 13(a) or 15(d) of the
Exchange Act that is incorporated by reference in the Registration Statement
shall be deemed to be a new registration statement relating to the securities
offered therein, and the offering of such securities at that time shall be
deemed to be the initial bona fide offering thereof.

      (c) Insofar as indemnification for liabilities arising under the
Securities Act may be permitted to directors, officers and controlling persons
of the Registrant pursuant to the foregoing provisions, or otherwise, the
Registrant has been advised that in the opinion of the Commission such
indemnification is against public policy as expressed in the Securities Act and
is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses
incurred or paid by a director, officer or controlling person of the Registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Securities Act and will be governed by the final
adjudication of such issue.


                                      II-3
<PAGE>   6


                                POWER OF ATTORNEY


      Know all men by these presents, that each person whose signature appears
below constitutes and appoints A. Maurice Myers, William L. Trubeck and Lawrence
O'Donnell, III, and each of them, each of whom may act without joinder of the
other, his true and lawful attorneys-in-fact and agents, with full power of
substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, to sign any or all pre- or post-effective amendments to
this Registration Statement, including without limitation any registration
statement of the type contemplated by Rule 462(b) under the Securities Act of
1933, as amended, and to file the same, with all exhibits thereto and other
documents in connection therewith, with the Securities and Exchange Commission,
granting unto said attorneys-in-fact and agents, and each of them, full power
and authority to do and perform each and every act and thing requisite and
necessary to be done in and about the premises, as fully to all intents and
purposes as he might or could do in person, hereby ratifying and confirming all
that said attorneys-in-fact and agents, and each of them, or substitute or
substitutes of any or all of them, may lawfully do or cause to be done by virtue
hereof.


                                   SIGNATURES

      Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all
requirements for filing on Form S-8 and has duly caused this Registration
Statement on Form S-8 to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Houston, State of Texas on the 31st day of
August, 2000.

                                       WASTE MANAGEMENT, INC.



                                           /s/ A. Maurice Myers
                                       -----------------------------------------
                                       By: A. Maurice Myers
                                           President and Chief Executive Officer


      Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement on Form S-8 has been signed by the following persons in
the capacities indicated on the 31st day of August, 2000.

<TABLE>
<CAPTION>
                   SIGNATURE                                                      TITLE
                   ---------                                                      -----
<S>                                                   <C>

/s/ A. Maurice Myers                                  President, Chief Executive Officer and Chairman of the Board
------------------------------------------------                      (Principal Executive Officer)
A. Maurice Myers


/s/ William L. Trubeck                                      Senior Vice President and Chief Financial Officer
------------------------------------------------                      (Principal Financial Officer)
William L. Trubeck


/s/ Bruce E. Snyder                                            Vice President and Chief Accounting Officer
------------------------------------------------                     (Principal Accounting Officer)
Bruce E. Snyder


/s/ H. Jesse Arnelle                                                            Director
------------------------------------------------
H. Jesse Arnelle
</TABLE>


                                      II-4
<PAGE>   7


<TABLE>
<S>                                                                             <C>

/s/ Pastora San Juan Cafferty                                                   Director
------------------------------------------------
Pastora San Juan Cafferty


/s/ Ralph F. Cox                                                                Director
------------------------------------------------
Ralph F. Cox


/s/ Robert S. Miller                                                            Director
------------------------------------------------
Robert S. Miller


/s/ Paul M. Montrone                                                            Director
------------------------------------------------
Paul M. Montrone


/s/ John C. Pope                                                                Director
------------------------------------------------
John C. Pope


/s/ Steven G. Rothmeier                                                         Director
------------------------------------------------
Steven G. Rothmeier


/s/ Ralph V. Whitworth                                                          Director
------------------------------------------------
Ralph V. Whitworth
</TABLE>


                                      II-5
<PAGE>   8


      Pursuant to the requirements of the Securities Act of 1933, the
Administrative Committee of the Waste Management Employee Benefit Plans has duly
caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Houston, the State of
Texas, on this 31st day of August, 2000.



WASTE MANAGEMENT RETIREMENT SAVINGS PLAN


By:  /s/ Patricia R. McCann
   -----------------------------------------
     Patricia R. McCann
     Vice President - Benefits and Payroll
     and Member - Administrative Committee


<PAGE>   9


                                INDEX TO EXHIBITS

<TABLE>
<CAPTION>
EXHIBIT
NUMBER         DESCRIPTION
------         -----------
<S>      <C>   <C>
4.1      -     Restated Certificate of Incorporation (Incorporated by reference
               to Exhibit 3.2 to the Registrant's Current Report on Form 8-K
               dated July 16, 1998).

4.2      -     Bylaws (Incorporated by reference to Exhibit 3 to the
               Registrant's Quarterly Report on Form 10-Q for the Quarter ended
               June 30, 2000).

23.1     -     Consent of PricewaterhouseCoopers LLP.

23.2     -     Consent of Arthur Andersen LLP.

24.1     -     Powers of Attorney (included on the signature page of this
               Registration Statement).
</TABLE>
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{"company-data": {"conformed-name": "WASTE MANAGEMENT INC", "cik": "0000823768", "assigned-sic": "4953", "irs-number": "731309529", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-45062", "film-number": "715753"}, "business-address": {"street1": "1001 FANNIN STREET", "street2": "STE 4000", "city": "HOUSTON", "state": "TX", "zip": "77002", "phone": "7135126200"}, "mail-address": {"street1": "1001 FANNIN STREET", "street2": "SUITE 4000", "city": "HOUSTON", "state": "TX", "zip": "77002"}, "former-company": {"former-conformed-name": "USA WASTE SERVICES INC", "date-changed": "19920703"}}
1
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON SEPTEMBER 1, 2000

                                                     REGISTRATION NO. 333-

-------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  ----------

                                    FORM S-8
                             REGISTRATION STATEMENT
                        UNDER THE SECURITIES ACT OF 1933

                                  ----------

                             WASTE MANAGEMENT, INC.
             (Exact name of Registrant as specified in its charter)

              DELAWARE                                          73-1309529
  (State or other jurisdiction                               (I.R.S. Employer
of incorporation or organization)                         Identification Number)

                              1001 FANNIN STREET
                                  SUITE 4000
                             HOUSTON, TEXAS 77001
                                (713) 512-6200
              (Address, including zip code, and telephone number,
       including area code of Registrant's principal executive offices)

                                  ----------

                    WASTE MANAGEMENT RETIREMENT SAVINGS PLAN
                           (Full titles of the Plans)

                                  ----------

                            LAWRENCE O'DONNELL, III
                             WASTE MANAGEMENT, INC.
                               1001 FANNIN STREET
                                   SUITE 4000
                              HOUSTON, TEXAS 77002
                                 (713) 512-6200
           (Name, address, including zip code, and telephone number,
                  including area code, of agent for service)

                                  ----------

                        CALCULATION OF REGISTRATION FEE
============================================================================================================================
                                                                                        PROPOSED MAXIMUM
            TITLE OF SECURITIES               AMOUNT TO BE     PROPOSED MAXIMUM             AGGREGATE          AMOUNT OF
              TO BE REGISTERED                 REGISTERED     OFFERING PRICE PER SHARE   OFFERING PRICE    REGISTRATION FEE
============================================================================================================================
Common Stock, par value $0.01 per share.....    2,500,000(1)         $19.00(2)            $47,500,000(3)       $12,540(3)
============================================================================================================================
(1)  Pursuant to Rule 416(c), this Registration Statement covers an
     indeterminate amount of interests to be offered or sold pursuant to the
     Waste Management Retirement Savings Plan (the "Plan"). See Explanatory Note
     on page one hereto.

(2)  Represents the average of the high and low prices of the Common Stock as
     reported on the New York Stock Exchange on August 30, 2000.

(3)  Computed in accordance with Rules 457(c) and (h) under the Securities Act
     of 1933, as amended, solely for the purpose of calculating the total
     registration fee. The aggregate offering price and amount of registration
     fee have been computed based on the average of the high and low prices of
     Common Stock as reported on the New York Stock Exchange on August 30, 2000.
2
                                EXPLANATORY NOTE

     Effective January 1, 1999, the Waste Management Retirement Savings Plan and
the Wheelabrator-Rust Savings and Retirement Plan (the "Old Waste Plans") were
merged into the USA Waste Services, Inc. Employee Savings Plan (the "Old USA
Plan"), which then changed its name to the Waste Management Retirement Savings
Plan (the "Plan"). On July 16, 1998, the Registrant filed registration statement
on Form S-8 No. 333-59247 registering the issuance of up to 3,343,410 shares
pursuant to the Old Waste Plans, all of which shares have been issued.
Additionally, on June 2, 1995, the Registrant filed registration statement on
Form S-8 No. 33-59807 registering the issuance of up to 500,000 shares pursuant
to the Old USA Plan, all of which shares have been issued.

     This Registration Statement on Form S-8 relates to the issuance of up to
2,500,000 shares of the Registrant's common stock that may be issued pursuant to
the Plan, as the same has been amended and restated subsequent to the January 1,
1999 merger of the Old Waste Plans and the Old USA Plan.

                                     PART I

              INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS

ITEM 1. PLAN INFORMATION. *

ITEM 2. REGISTRANT INFORMATION AND EMPLOYEE PLAN ANNUAL INFORMATION. *

----------

* Information required by Part I to be contained in the Section 10(a) prospectus
is omitted from this Registration Statement in accordance with Rule 428 under
the Securities Act of 1933, as amended, and the "Note" to Part I of Form S-8.
3

                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3. INCORPORATION OF DOCUMENTS BY REFERENCE.

     The following documents filed with the Securities and Exchange Commission
(the "Commission") by the Registrant are hereby incorporated by reference into
this Registration Statement:

     (a)  Annual Report on Form 10-K for the fiscal year ended December 31,
          1999.

     (b)  Quarterly Report on Form 10-Q for the quarter ended March 31, 2000.

     (c)  Quarterly Report on Form 10-Q for the quarter ended June 30, 2000.

     (d)  The description of the Registrant's Common Stock contained in the
          Registrant's Registration Statement on Form 8-A filed with the
          Commission pursuant to Section 12 of the Securities Exchange Act of
          1934, as amended (the "Exchange Act"), on July 1, 1993, as amended on
          Form 8-B filed with the Commission on July 13, 1995.

     The Plan's Annual Report on Form 11-K for the fiscal year ended December
31, 1999 as filed with the Commission is also hereby incorporated by reference
into this Registration Statement.

     All documents subsequently filed by the Registrant and the Plan pursuant to
Sections 13(a), 13(c), 14 and 15(d) of the Securities Exchange Act of 1934,
prior to the filing of a post-effective amendment which indicates that all of
the securities offered hereby have been sold or which deregisters all securities
then remaining unsold, shall be deemed to be incorporated by reference in this
Registration Statement and to be a part hereof from the date of filing of such
documents.

ITEM 4. DESCRIPTION OF SECURITIES.

     Not applicable.

ITEM 5. INTERESTS OF NAMED EXPERTS AND COUNSEL.

     Not applicable.

ITEM 6. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

     The Restated Certificate of Incorporation (the "Charter") and the Bylaws of
the Registrant provide in effect that the Registrant shall indemnify its
directors, officers, employees and agents (as well as persons serving as a
director officer, employee or agent of any of the Registrant's direct or
indirect subsidiaries) to the extent permitted by the General Corporation Law of
the State of Delaware (the "DGCL"). Sections 102 and 145 of the DGCL provide
that a Delaware corporation has the power to indemnify its directors, officers,
employees and agents in certain circumstances, as described below.

     In accordance with Section 102 of the DGCL, the Registrant's Charter
contains a provision that eliminates the personal liability of directors of the
Registrant or its stockholders for monetary damages for breach of fiduciary duty
as a director, except in cases where the director breached his or her duty of
loyalty to the Registrant or its stockholders, failed to act in good faith,
engaged in intentional misconduct or a knowing violation of the law, willfully
or negligently authorized the unlawful payment of a dividend or approved an
unlawful stock redemption or repurchase or obtained an improper personal
benefit.

                                      II-1
4

     Pursuant to Subsection (a) of Section 145 of the DGCL, the Registrant's
Bylaws provide that the Registrant shall indemnify any director, officer,
employee or agent, or former director, officer, employee or agent who was or is
a party or is threatened to be made a party to any threatened, pending or
completed action, suit or proceeding, whether civil, criminal, administrative or
investigative (other than an action by or in the right of the Registrant),
against expenses (including attorney's fees), judgments, fines and amounts paid
in settlement actually and reasonably incurred in connection with such action,
suit or proceeding provided that such director, officer, employee or agent acted
in good faith and in a manner he or she reasonably believed to be in or not
opposed to the best interests of the corporation, and, with respect to any
criminal action or proceeding, provided that such director, officer, employee or
agent had no reasonable cause to believe that his or her conduct was unlawful.

     Pursuant to Subsection (b) of Section 145 of the DGCL, the Registrant's
Bylaws provide that the Registrant shall indemnify any director, officer,
employee or agent, or former director, officer, employee or agent, who was or is
a party or is threatened to be made a party to any threatened, pending or
completed action or suit by or in the right of the Registrant to procure a
judgment in its favor by reason of the fact that such person acted in any of the
capacities set forth above, against expenses (including attorney's fees),
judgments, fines, penalties and amounts paid in settlement actually and
reasonably incurred in connection with the investigation, preparation to defend
or defense of such action or suit provided that such person acted in good faith
and in a manner he or she reasonably believed to be in or not opposed to the
best interest of the Registrant, except that no indemnification may be made in
respect of any claim, issue or matter as to which such person shall have been
adjudged to be liable to the Registrant unless and only to the extent that the
Court of Chancery (or such other court in which such action or suit has been
brought) shall determine that despite the adjudication of liability such person
is fairly and reasonable entitled to indemnity for such expenses which the court
shall deem proper.

     The Registrant's Bylaws further provide that, to the extent that a
director, officer employee or agent has been successful in the defense of any
action, suit or proceeding referred to in subsections (a) and (b) of Section 145
of the DGCL or in the defense of any claim, issue or matter therein, he or she
shall be indemnified against expenses (including attorneys' fees) actually and
reasonable incurred by him or her in connection therewith. Any person seeking
indemnification as described above shall be deemed to have met the standard of
conduct required for such indemnification unless the contrary shall be
established. The indemnification provided by Section 145 of the DGCL shall not
be exclusive of any other rights to which the party seeking indemnification may
be entitled.

     Section 145 of the DGCL also provides that a corporation is empowered to
purchase and maintain insurance on behalf of a director, officer, employee or
agent of the corporation against any liability asserted against him or her or
incurred by him or her in any such capacity or arising out of his or her status
as such whether or not the corporation would have the power to indemnify him or
her against such liabilities under Section 145 of the DGCL. The Registrant has
purchased certain liability insurance for its officers and directors.

     The Registrant has entered into indemnification agreements with certain of
its executive officers and certain o its executive officers' employment
agreements contain indemnification provisions. Such agreements and provisions
generally provide that such persons will be indemnified and held harmless to the
fullest extent of Delaware law.

ITEM 7. EXEMPTION FROM REGISTRATION CLAIMED.

     Not applicable.

ITEM 8. EXHIBITS.

     The following exhibits are filed as part of this Registration Statement:

4.1   -   Restated Certificate of Incorporation (Incorporated by reference to
          Exhibit 3.2 to the Registrant's Current Report on Form 8-K dated July
          16, 1998).

4.2   -   Bylaws (Incorporated by reference to Exhibit 3 to the Registrant's
          Quarterly Report on Form 10-Q for the Quarter ended June 30, 2000).

23.1  -   Consent of PricewaterhouseCoopers LLP.

23.2  -   Consent of Arthur Andersen LLP.

                                      II-2
5

24.1  -   Powers of Attorney (included on the signature page of this
          Registration Statement).

      The Registrant hereby undertakes that it will submit or has submitted the
Plan and any amendment thereto to the Internal Revenue Service (the "IRS") in a
timely manner and has made or will make all changes required by the IRS in order
to qualify the Plan.

ITEM 9. UNDERTAKINGS.

      (a)   The undersigned Registrant hereby undertakes:

      (1)   To file, during any period in which offers or sales are being made,
            a post-effective amendment to this Registration Statement:

            (i)   to include any prospectus required by Section 10(a)(3) of the
                  Securities Act of 1933, as amended (the "Securities Act");

            (ii)  to reflect in the prospectus any facts or events arising after
                  the effective date of the Registration Statement which
                  represent a fundamental change in the information set forth in
                  the Registration Statement; and

            (iii) to include any material information with respect to the plan
                  of distribution not previously disclosed in the Registration
                  Statement or any material change to such information in the
                  Registration Statement.

      Provided, however, that the undertakings set forth in paragraphs (a)(1)(i)
      and (a)(1)(ii) do not apply if the information required to be included in
      a post-effective amendment by those paragraphs is contained in periodic
      reports filed by the Registrant pursuant to Section 13 or Section 15(d) of
      the Exchange Act that are incorporated by reference in this Registration
      Statement.

      (2)   That, for the purpose of determining any liability under the
            Securities Act, each such post-effective amendment shall be deemed
            to be a new registration statement relating to the securities
            offered therein, and the offering of such securities at that time
            shall be deemed to be the initial bona fide offering thereof; and

      (3)   To remove from registration by means of a post-effective amendment
            any of the securities being registered that remain unsold at the
            termination of the offering.

      (b) The undersigned Registrant hereby further undertakes that, for
purposes of determining any liability under the Securities Act, each filing of
the Registrant's annual report pursuant to Section 13(a) or 15(d) of the
Exchange Act that is incorporated by reference in the Registration Statement
shall be deemed to be a new registration statement relating to the securities
offered therein, and the offering of such securities at that time shall be
deemed to be the initial bona fide offering thereof.

      (c) Insofar as indemnification for liabilities arising under the
Securities Act may be permitted to directors, officers and controlling persons
of the Registrant pursuant to the foregoing provisions, or otherwise, the
Registrant has been advised that in the opinion of the Commission such
indemnification is against public policy as expressed in the Securities Act and
is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses
incurred or paid by a director, officer or controlling person of the Registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Securities Act and will be governed by the final
adjudication of such issue.

                                      II-3
6

                                POWER OF ATTORNEY

      Know all men by these presents, that each person whose signature appears
below constitutes and appoints A. Maurice Myers, William L. Trubeck and Lawrence
O'Donnell, III, and each of them, each of whom may act without joinder of the
other, his true and lawful attorneys-in-fact and agents, with full power of
substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, to sign any or all pre- or post-effective amendments to
this Registration Statement, including without limitation any registration
statement of the type contemplated by Rule 462(b) under the Securities Act of
1933, as amended, and to file the same, with all exhibits thereto and other
documents in connection therewith, with the Securities and Exchange Commission,
granting unto said attorneys-in-fact and agents, and each of them, full power
and authority to do and perform each and every act and thing requisite and
necessary to be done in and about the premises, as fully to all intents and
purposes as he might or could do in person, hereby ratifying and confirming all
that said attorneys-in-fact and agents, and each of them, or substitute or
substitutes of any or all of them, may lawfully do or cause to be done by virtue
hereof.

                                   SIGNATURES

      Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all
requirements for filing on Form S-8 and has duly caused this Registration
Statement on Form S-8 to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Houston, State of Texas on the 31st day of
August, 2000.

                                       WASTE MANAGEMENT, INC.

                                           /s/ A. Maurice Myers
                                       -----------------------------------------
                                       By: A. Maurice Myers
                                           President and Chief Executive Officer

      Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement on Form S-8 has been signed by the following persons in
the capacities indicated on the 31st day of August, 2000.
SIGNATURE                                                      TITLE
                   ---------                                                      -----
/s/ A. Maurice Myers                                  President, Chief Executive Officer and Chairman of the Board
------------------------------------------------                      (Principal Executive Officer)
A. Maurice Myers

/s/ William L. Trubeck                                      Senior Vice President and Chief Financial Officer
------------------------------------------------                      (Principal Financial Officer)
William L. Trubeck

/s/ Bruce E. Snyder                                            Vice President and Chief Accounting Officer
------------------------------------------------                     (Principal Accounting Officer)
Bruce E. Snyder

/s/ H. Jesse Arnelle                                                            Director
------------------------------------------------
H. Jesse Arnelle
II-4
7
/s/ Pastora San Juan Cafferty                                                   Director
------------------------------------------------
Pastora San Juan Cafferty

/s/ Ralph F. Cox                                                                Director
------------------------------------------------
Ralph F. Cox

/s/ Robert S. Miller                                                            Director
------------------------------------------------
Robert S. Miller

/s/ Paul M. Montrone                                                            Director
------------------------------------------------
Paul M. Montrone

/s/ John C. Pope                                                                Director
------------------------------------------------
John C. Pope

/s/ Steven G. Rothmeier                                                         Director
------------------------------------------------
Steven G. Rothmeier

/s/ Ralph V. Whitworth                                                          Director
------------------------------------------------
Ralph V. Whitworth
II-5
8

      Pursuant to the requirements of the Securities Act of 1933, the
Administrative Committee of the Waste Management Employee Benefit Plans has duly
caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Houston, the State of
Texas, on this 31st day of August, 2000.

WASTE MANAGEMENT RETIREMENT SAVINGS PLAN

By:  /s/ Patricia R. McCann
   -----------------------------------------
     Patricia R. McCann
     Vice President - Benefits and Payroll
     and Member - Administrative Committee
9

                                INDEX TO EXHIBITS
EXHIBIT
NUMBER         DESCRIPTION
------         -----------
4.1      -     Restated Certificate of Incorporation (Incorporated by reference
               to Exhibit 3.2 to the Registrant's Current Report on Form 8-K
               dated July 16, 1998).

4.2      -     Bylaws (Incorporated by reference to Exhibit 3 to the
               Registrant's Quarterly Report on Form 10-Q for the Quarter ended
               June 30, 2000).

23.1     -     Consent of PricewaterhouseCoopers LLP.

23.2     -     Consent of Arthur Andersen LLP.

24.1     -     Powers of Attorney (included on the signature page of this
               Registration Statement).