POWER OF ATTORNEY

POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and
appoints each of Mitchell W. Pratt, Richard R. Wheeler and Camela Krebs, signing
singly, the undersigned's true and lawful attorney-in-fact to:

(1) execute for and on behalf of the undersigned, in the undersigned's
capacity as an officer, director or beneficial owner of more than ten percent of
any registered class of the securities of Clean Energy Fuels Corp., or more of
its subsidiaries (the "Company"), SEC Form ID - Uniform Application for Access
Codes to File On EDGAR;

(2) execute for and on behalf of the undersigned, in the undersigned's
capacity as an officer, director or beneficial owner of more than ten percent of
any registered class of the securities of the Company, Forms 3, 4 and 5 in
accordance with Section 16(a) of the Securities Exchange Act of 1934 and the
rules thereunder;

(3) do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete and execute any such Form ID or
Form 3, 4 or 5 and file such form with the United States Securities and Exchange
Commission and any stock exchange or similar authority; and

(4) take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,
and in the best interest of, or legally required by, the undersigned.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and rights and powers herein granted.
The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in
such capacity at the request of the undersigned, are not assuming, nor is the
Company assuming, any of the undersigned's responsibilities to comply with
Section 16 of the Securities Exchange Act of 1934.

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 19 day of May, 2007.

Signature /s/ Andrew J. Littlefair
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Print Name: Andrew J. Littlefair