EXHIBIT 12
WASTE MANAGEMENT, INC.
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
(In Millions, Except Ratios)
(Unaudited)
                 
    Three Months Ended  
    March 31,  
    2007     2006  
Income before income taxes, losses in equity investments and minority interests
  $ 368     $ 310  
 
           
Fixed charges deducted from income:
               
Interest expense
    135       136  
Implicit interest in rents
    20       13  
 
           
 
    155       149  
 
           
Earnings available for fixed charges (a)
  $ 523     $ 459  
 
           
 
               
Interest expense
  $ 135     $ 136  
Capitalized interest
    4       3  
Implicit interest in rents
    20       13  
 
           
Total fixed charges (a)
  $ 159     $ 152  
 
           
 
               
Ratio of earnings to fixed charges
    3.3x       3.0x  
 
           
 
(a)   To the extent interest may be assessed by taxing authorities on any underpayment of income tax, such amounts are classified as a component of income tax expense in our Statements of Operations. This accounting policy election, which was required by our adoption of Financial Accounting Standards Board Interpretation No. 48, Accounting for Uncertainty in Income Taxes (an interpretation of FASB Statement No. 109), is a continuation of the Company’s historical policy and will continue to be consistently applied in the future. For purposes of this disclosure, we have elected to exclude interest expense related to income tax matters from our measurements of “Earnings available for fixed charges” and “Total fixed charges” for all periods presented.