CleanTech Biofuels Provides Clarification for Investors Concerning Trading Under the Stock Symbol of CLTH

ST. LOUIS, MO -- (Marketwire) -- 02/25/11 -- CleanTech Biofuels, Inc. (OTCQB: CLTH) (PINKSHEETS: CLTH), an early stage development company focusing on providing cellulosic biomass feedstock derived from municipal solid waste (MSW) for renewable energy and bio-based chemical production, provides clarification for investors regarding the trading of its common stock under the trading symbol of "CLTH." CleanTech Biofuels, Inc. was advised by OTC Markets Group Inc., which operates the world's largest electronic marketplace for broker-dealers to trade unlisted stocks, that the market-makers in our common stock have completed their migration off of FINRA's BB (Bulletin Board) to OTC Markets Group. As a result, the Company is being categorized under the OTCQB tier in which investors can view Real Time Level II stock quotes for CleanTech Biofuels, Inc. at http://www.otcmarkets.com.

The OTCQB is a market tier for OTC traded companies that are registered and reporting with the Securities and Exchange Commission ("SEC"). The Company plans to continue to file all periodic reports with the SEC pursuant to the requirements of the Securities Exchange Act of 1934, as amended, and pursue all other aspects of its business in the normal course.

About CleanTech Biofuels, Inc.
CleanTech Biofuels, Inc. is an early-stage development company with patented technology designed to produce cellulosic biomass feedstock derived from municipal solid waste for renewable energy and bio-based chemical production while achieving single-stream recycling.

About OTC Markets Group
OTC Markets Group Inc. operates the world's largest electronic marketplace for broker-dealers to trade unlisted stocks. Its OTC Link platform supports an open network of competing broker-dealers that provide investors with the best prices in over 10,000 OTC securities. In 2010, securities on OTC Link traded over $144 billion in dollar volume, making it the third largest U.S. equity trading venue after NASDAQ and the NYSE. To learn more about the OTC Markets Group, visit http://www.otcmarkets.com.

Safe Harbor Statement
This news release may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements contained in this release are based on management's exercise of business judgment as well as assumptions made by and information currently available to management. When used in this document, the words "may," "will," "anticipate," "believe," "estimate," "expect," "intend," and similar words, are intended to identify any forward-looking statements. The risks and uncertainties that may affect the operations, performance development, and results of the Company's business include but are not limited to fluctuations in financial results, availability and customer acceptance of our products and services, the impact of competitive products, services and pricing, general market trends and conditions, and other risks as detailed in the Company's SEC reports.

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Company Contact:
CleanTech Biofuels, Inc.
Ed Hennessey
President and CEO
Email Contact

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