Dallas Mayor Leppert, City Council to Join Ameresco and Dallas Water Utilities in Opening of Innovative Biogas Energy Recovery Facility

Ameresco (NYSE: AMRC)

        Dallas Mayor Tom Leppert, members of the Dallas City Council, Dallas
What:   Water Utilities (DWU) Administrators, Ameresco Executive Michael T.
        Bakas, and other local officials and business leaders will host a ribbon
        cutting ceremony on a 4.3 MW biogas capture and refining facility.

        The new biogas plant will generate electricity and thermal load to power
        DWU's facilities. The plant will offset the electricity that DWU
        currently pulls from the grid, and DWU has the option to sell the
        generated electricity back into the grid. Ameresco was chosen by Dallas
        to design, build and operate the plant, expected to save the City at
        least $1.5 million annually, and designed to reduce carbon dioxide
        emissions by 19,150 metric tons annually.

Who:    - Dallas Mayor Tom Leppert

        - Tennell Atkins, Dallas City Councilmember, District 8

        - Michael T. Bakas, Ameresco Senior Vice President

        - State Senator Bob Deuell

        - State Representative Barbara Mallory Caraway

        - County Commissioner John Wiley Price

When:   12 noon, Wednesday, Feb. 2

Where:  City of Dallas Water Utilities, 10011 Log Cabin Road

        News media representatives will be directed to the press conference site
Note:   at the front gate. Tours of the site will also be conducted at the
        conclusion of the event.

About Ameresco, Inc.

Ameresco, Inc. was incorporated in Delaware in April 2000 and is a leading independent provider of comprehensive energy efficiency and renewable energy solutions for facilities throughout North America. Ameresco's solutions include upgrades to a facility's energy infrastructure, and the development, construction, and operation of renewable energy plants. With corporate headquarters located in Framingham, MA, Ameresco has 55 offices in 29 states and four Canadian provinces. For more information visit www.ameresco.com.

    Source: Ameresco

Released January 28, 2011