APRIL 7, 2008 - PAUL GILMAN NAMED CHIEF SUSTAINABILITY OFFICER AT COVANTA ENERGY

FAIRFIELD, NJ, APRIL 7, 2008 – Covanta Holding Corporation (NYSE: CVA), a world leader in the development and operation of large scale Energy-from-Waste and renewable energy projects, today announced the appointment of Paul Gilman to the newly-created position of Senior Vice President and Chief Sustainability Officer at its principal subsidiary, Covanta Energy Corporation. Mr. Gilman’s appointment is effective immediately.

Mr. Gilman previously was Founding Director of the Oak Ridge Center for Advanced Studies, a collaborative effort of several prominent universities and the Oak Ridge National Laboratory focused on societal issues with scientific and engineering content. Prior to starting the Oak Ridge Center in 2004, Mr. Gilman was Assistant Administrator for Research and Development at the U.S. Environmental Protection Agency, and held senior policy positions in the public and private sectors, including positions at the National Academy of Sciences, the U.S. Department of Energy and the White House Office of Management and Budget.

“We are delighted to welcome Paul to the Covanta team. He is a seasoned environmental executive with a broad range of scientific and policy experience that make him uniquely qualified to spearhead our initiatives on sustainability and environmental stewardship,” said Anthony Orlando, Covanta’s Chief Executive Officer. “These initiatives are an investment in Covanta’s future, and increasingly important as we execute on our growth strategy. I am confident that Paul’s leadership and experience will serve Covanta and its shareholders well.”

About Covanta
Covanta Holding Corporation, a New York Stock Exchange listed company, is an internationally recognized owner and operator of energy-from-waste and renewable energy projects. Covanta's energy-from-waste facilities convert municipal solid waste into renewable energy for numerous communities, predominantly in the United States. As a world premier operator of large-scale energy-from-waste facilities, Covanta is proud to offer an environmentally sound solution to communities' solid waste disposal needs. With 37 energy-from-waste facilities worldwide, Covanta uses municipal solid waste as a fuel to generate clean, renewable energy. Covanta's modern energy-from-waste facilities safely and securely convert 15 million tons of waste into more than 8 million megawatt hours of clean renewable electricity each year and create 10 billion pounds of steam that are sold to a variety of industries. For more information, visit www.covantaholding.com.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS
Certain statements in this press release may constitute "forward-looking" statements as defined in Section 27A of the Securities Act of 1933 (the "Securities Act"), Section 21E of the Securities Exchange Act of 1934 (the "Exchange Act"), the Private Securities Litigation Reform Act of 1995 (the "PSLRA") or in releases made by the Securities and Exchange Commission, all as may be amended from time to time. Such forward-looking statements involve known and unknown risks, uncertainties and other important factors that could cause the actual results, performance or achievements of Covanta and its subsidiaries, or industry results, to differ materially from any future results, performance or achievements expressed or implied by such forward-looking statements. Statements that are not historical fact are forward-looking statements. Forward-looking statements can be identified by, among other things, the use of forward-looking language, such as the words "plan," "believe," "expect," "anticipate," "intend," "estimate," "project," "may," "will," "would," "could," "should," "seeks," or "scheduled to," "proposed," or other similar words, or the negative of these terms or other variations of these terms or comparable language, or by discussion of strategy or intentions. These cautionary statements are being made pursuant to the Securities Act, the Exchange Act and the PSLRA with the intention of obtaining the benefits of the "safe harbor" provisions of such laws. Covanta cautions investors that any forward-looking statements made by Covanta are not guarantees or indicative of future performance. Important assumptions and other important factors that could cause actual results to differ materially from those forward-looking statements with respect to Covanta, include, but are not limited to, those factors, risks and uncertainties that are described in Item 1A of its Annual Report on Form 10-K for the year ended December 31, 2007, and in subsequent securities filings by Covanta.

Although Covanta believes that its plans, intentions and expectations reflected in or suggested by such forward-looking statements are reasonable, actual results could differ materially from a projection or assumption in any forward-looking statements. Covanta's future financial condition and results of operations, as well as any forward-looking statements, are subject to change and inherent risks and uncertainties. The forward-looking statements contained in this press release are made only as of the date hereof and Covanta does not have or undertake any obligation to update or revise any forward-looking statements whether as a result of new information, subsequent events or otherwise, unless otherwise required by law.

For more information, please contact:
Bradford Helgeson
Vice President & Treasurer
1-973-882-4193

Vera Carley
Media Relations Manager
1-973-882-2439