ADA-ES Receives Prestigious Award for Air Pollution Control Technology

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TO BUSINESS AND ENVIRONMENTAL EDITORS:

ADA-ES Receives Prestigious Award for Air Pollution Control Technology

COLORADO, LITTLETON, Mar. 29 -/E-Wire/-- Environmental technology and specialty chemical company ADA-ES, a subsidiary of Earth Sciences (OTC Bulletin Board: ESCI), has been awarded the 2001 J. Deane Sensenbaugh Award by the Air and Waste Management Association (A&WMA;).

A&WMA;, recognized as the premier international environmental organization promoting global environmental responsibility, presented this award to ADA-ES in recognition of outstanding achievement in the field of air pollution control. ADA-ES is one of only nine organizations to receive this prestigious award in the last 13 years.

The award recognizes ADA-ES' flue gas conditioning products that reduce the emission of fine particles into the atmosphere from industrial plants. The products were initially developed with funding from the Department of Energy National Energy Technology Laboratory and EPRI, with the commercialization effort funded by Earth Sciences. Proprietary products developed through this effort have been successfully used by coal-fired electric power generating plants for more than two years, resulting in reduced emissions and lower operating costs.

A&WMA; based the award on the overall significance of the technology in solving a need and contributing to state-of-the-art technology.

Responding to the announcement, ADA-ES President Michael Durham said, "We are excited about this award because it recognizes the hard work that goes into developing and introducing new products into the air pollution market. We support and promote the environmental responsibility of our clients by continually improving our products and keeping new technology on the drawing board to meet future demands."

Past winners of this notable award include Joy/Niro, Research Cottrell, and the Gas Research Institute. This year's award will be presented to ADA-ES at the association's annual meeting in June.

About ADA-ES Headquartered in Littleton, Colo., ADA-ES is an environmental technology and specialty chemical company that brings 25 years of experience to improve responsible profitability for electric power and industrial companies through proprietary products and systems that mitigate environmental impact while reducing operating costs.

ADA-ES is a subsidiary of Earth Sciences, whose common stock trades on the OTCBB under the symbol ESCI.

This press release may contain forward-looking information within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. The United States Private Securities Litigation Reform Act of 1995 provides a "safe harbor" for such forward- looking statements in this document that are based on information the Company believes reasonable, but such projections and statements involve significant uncertainties. Actual events or results could differ materially from those discussed in the forward-looking statements as a result of various factors including but not limited to changing market demand for ADA-ES chemicals and systems and changes in technology, laws or regulations, demand for the Company's securities, and other factors discussed in the Company's 1999 Form 10-KSB and recent Form 10-QSBs.

Michael Durham of ADA-ES, [REDACTED-PHONE], [REDACTED-EMAIL]

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