CONSOLIDATED NATURAL GAS COMPANY AND SUBSIDIARIES EXHIBIT 12 RATIO OF EARNINGS TO FIXED CHARGES (Millions of Dollars) Twelve Months Ended June 30, 2001 Years ended December 31, ------------------- -------------------------------------------- 2000 1999 1998 1997 1996 ---- ---- ---- ---- ---- Earnings: Income from continuing operations 467.0 213.3 136.8 287.7 318.9 309.4 Add income taxes 267.0 147.1 73.5 129.7 156.3 162.3 ----- ----- ----- ----- ----- ----- Income from continuing operations before income taxes 734.0 360.4 210.3 417.4 475.2 471.7 Distributed income from unconsolidated investees, less equity in earnings thereof 12.7 13.1 (12.4) (1.9) 1.6 (1.1) ----- ----- ----- ----- ----- ----- Subtotal 746.7 373.5 197.9 415.5 476.8 470.6 ----- ----- ----- ----- ----- ----- Add fixed charges: Interest on long-term debt, including amortization of debt discount and expense less premium 196.8 172.8 136.9 126.0 110.7 105.2 Portion of rental deemed to representative of the interest factor 11.2 11.3 11.7 10.6 9.7 9.1 Fixed charges associated with 50% projects with debt 0.0 0.0 0.0 0.4 2.0 2.2 ----- ----- ----- ----- ----- ----- Total Fixed Charges 208.0 184.1 148.6 137.0 122.4 116.5 ----- ----- ----- ----- ----- ----- Total Earnings 954.7 557.6 346.5 552.5 599.2 587.1 ----- ----- ----- ----- ----- ----- Ratio of Earnings to Fixed Charges 4.59 3.03 2.33 4.03 4.90 5.04 ===== ===== ===== ===== ===== =====