Exhibit 23.7
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in this Registration Statement onForm S-3 of Covanta Holding Corporation of our report dated March 29, 2004 relating to the financial statements of Covanta Ref-Fuel Holdings LLC (formerly Ref-Fuel Holdings LLC and Subsidiaries) for the period from January 1, 2003 to December 12, 2003 and the year ended December 31, 2002, which appears in the Current Report onForm 8-K of Covanta Holding Corporation dated April 7, 2005. We also consent to the references to us under the headings “Experts” in such Registration Statement.
/s/ PricewaterhouseCoopers LLP
Florham Park, NJ
January 17, 2007