Exhibit 12
                             WMX TECHNOLOGIES, INC.

                       Ratio of Earnings to Fixed Charges
                                  (Unaudited)

                      (millions of dollars, except ratio)



                                                             Year Ended December 31,
                                      --------------------------------------------------------------
                                      1991(1)      1992(2)      1993(3)(6)   1994(4)(6)   1995(5)(6)
                                      ----         ----         ----         ----         ----        
                                                                                   
Income From Continuing Operations 
  Before Income Taxes,                                                               
  Undistributed Earnings from                                                             
  Affiliated Companies, Minority                                                          
  Interest, Extraordinary                                                                 
  Item and Cumulative Effect of                                                           
  Accounting Changes................  $  1,139.4   $  1,555.2   $    841.0   $  1,461.1   $  1,267.5
Interest Expense....................       279.9        311.0        393.6        439.7        506.2
             Capitalized Interest...      (111.4)       (87.9)      (100.6)      (104.5)       (81.5)
One-Third of Rents Payable                                                                   
  in the Next Year..................        46.7         44.7         48.5         53.9         56.8
                                      ----------   ----------   ----------   ----------   ----------

Income From Continuing Operations 
  Before Income Taxes,                                                                  
  Undistributed Earnings from                                                                
  Affiliated Companies, Minority                                                             
  Interest, Extraordinary                                                                    
  Item, Cumulative Effect of                                                                 
  Accounting Changes, Interest and                                                           
  One-Third of Rents................  $  1,354.6   $  1,823.0   $  1,182.5   $  1,850.2   $  1,749.0
                                      ==========   ==========   ==========   ==========   ==========

Interest Expense....................  $    279.9   $    311.0   $    393.6   $    439.7   $    506.2
One-Third of Rents Payable in the                                                            
  Next Year.........................        46.7         44.7         48.5         53.9         56.8
                                      ----------   ----------   ----------   ----------   ----------

Interest Expense plus One-Third                                                              
  of Rents..........................  $    326.6   $    355.7   $    442.1   $    493.6   $    563.0
                                      ==========   ==========   ==========   ==========   ==========
                                                                                          
Ratio of Earnings to Fixed                                                                
  Charges...........................   4.15 to 1    5.13 to 1    2.67 to 1    3.75 to 1    3.11 to 1

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(1)  The results for 1991 include a special charge ($296.0 million before tax
and minority interest) primarily to reflect then current estimates of the
environmental remediation liabilities at waste disposal sites previously used or
operated by the Company and its subsidiaries or their predecessors.

(2)  The results for 1992 include a non-taxable gain ($240.0 million before
minority interest) resulting from the initial public offering of 75 million
newly issued ordinary shares of Waste Management International plc in April 1992
and special charges ($219.9 million before tax and minority interest).  The
results for 1992 exclude the cumulative effect of accounting changes ($71.1
million after tax and minority interest) related to the adoption of Statements
of Financial Accounting Standards Nos. 106 and 109.

(3)  The results for 1993 include a non-taxable gain ($15.1 million before
minority interest) relating to the issuance of shares by Rust International Inc.
as well as a special asset revaluation and restructuring charge ($550.0 million
before tax and minority interest) related primarily to a revaluation of Chemical
Waste Management, Inc.'s thermal treatment business.

(4)  The results for 1994 include a charge ($9.2 million before tax and
minority interest) recorded by Rust International Inc. to write off assets and
recognize costs of exiting certain of Rust's service lines and closing offices
in a consolidation of certain of its operating groups.

(5)  The results for 1995 include a special charge ($140.6 million before tax)
recorded by Chemical Waste Management, Inc., primarily to write off its
investment in facilities and technologies that it abandoned because they do not
meet customer service or performance objectives, and a special charge ($194.6
million before tax and minority interest) recorded by Waste Management
International plc relating to actions it is taking to sell or otherwise dispose
of non-core businesses and investments, as well as core businesses and
investments in low potential markets, abandon certain hazardous waste treatment
and processing technologies and streamline its country management organization.

 
(6)  In 1995, the Rust International Inc. Board of Directors approved a plan
to sell or otherwise discontinue that company's process engineering,
construction, specialty contracting and similar lines of business.  Accordingly,
these businesses have been segregated as discontinued operations in the
financial statements since 1993.  It is not practical to restate periods prior
to the formation of Rust International Inc. on January 1, 1993, for the
discontinued operations.  The ratio of earnings to fixed charges for 1993 and
1994 have been restated.