Form: S-1/A

General form of registration statement for all companies including face-amount certificate companies

May 21, 2007

Documents


Exhibit 21.1

Subsidiaries

      •
      Clean Energy Fueling Services Corp.

      •
      Clean Energy

      •
      Clean Energy Construction

      •
      Clean Energy Finance, LLC

      •
      Blue Energy General, LLC

      •
      Blue Energy Limited, LLC

      •
      Clean Energy & Technologies LLC

      •
      Clean Energy LNG, LLC

      •
      Clean Energy Texas LNG, LLC

      •
      Blue Fuels Group, LP

      •
      DFW Airport CNG Partnership, LLP

      •
      TranStar Energy Company, LP

      •
      Natural Fuels Company LLC

      •
      Natural/Peoples LLC

      •
      Natural/Total Limited Liability Company

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