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                                                                                                                      EXHIBIT 4.2

<S>                                            <C>                                                            <C>
               NUMBER                             (SEE REVERSE SIDE FOR LEGEND)                                         SHARES

         ______C

                                             TREMISIS ENERGY ACQUISITION CORPORATION

                                        INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

                                                            COMMON STOCK

                                                                                                                 SEE REVERSE FOR
                                                                                                             CERTAIN DEFINITIONS

                  THIS CERTIFIES THAT                                                             CUSIP 894727106

                  IS THE OWNER OF

                        FULLY PAID AND NON-ASSESSABLE SHARES OF THE PAR VALUE OF $.0001 EACH OF THE COMMON STOCK OF

                                                 TREMISIS ENERGY ACQUISITION CORPORATION

                 transferable on the books of the Corporation in person or by duly authorized attorney upon surrender of
                      this certificate properly endorsed. This certificate is not valid unless countersigned by the
                            Transfer Agent and registered by the Registrar. Witness the seal of the Corporation
                                        and the facsimile signatures of its duly authorized officers.

                  Dated:

                                                            [LOGO OMITTED]
         --------------------------------------------                               ----------------------------------------------
         CHAIRMAN                                                                   SECRETARY
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         The following abbreviations, when used in the inscription on the face
of this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

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<S>                      <C>                                         <C>
         TEN COM -         as tenants in common                       UNIF GIFT MIN ACT - _____   Custodian ______
         TEN ENT -         as tenants by the entireties                                   (Cust)            (Minor)
         JT TEN -          as joint tenants with right of survivorship         under Uniform Gifts to Minors
                           and not as tenants in common                            Act ______________
                                                                                          (State)
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    Additional Abbreviations may also be used though not in the above list.

                     TREMISIS ENERGY ACQUISITION CORPORATION

         The Corporation will furnish without charge to each stockholder who so
requests the powers, designations, preferences and relative, participating,
optional or other special rights of each class of stock or series thereof of the
Corporation and the qualifications, limitations, or restrictions of such
preferences and/or rights. This certificate and the shares represented thereby
are issued and shall be held subject to all the provisions of the Certificate of
Incorporation and all amendments thereto and resolutions of the Board of
Directors providing for the issue of shares of Preferred Stock (copies of which
may be obtained from the secretary of the Corporation), to all of which the
holder of this certificate by acceptance hereof assents.

         For value received, ___________________________ hereby sell, assign and
transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
    IDENTIFYING NUMBER OF ASSIGNEE

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________________________________________________________________________________
 (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

________________________________________________________________________________

________________________________________________________________________________

_________________________________________________________________________ shares

of the capital stock represented by the within Certificate, and do hereby
irrevocably constitute and appoint ____________________________________________
______________________________________Attorney to transfer the said stock on the
books of the within named Corporation will full power of substitution in the
premises.

Dated _________________

                               _________________________________________________
                               NOTICE:  The signature to this assignment must
                                        correspond with the name as written
                                        upon the face of the certificate in
                                        every particular, without alteration or
                                        enlargement any change whatever.
Signature(s) Guaranteed:

________________________________________________________
THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR
INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS
AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE
GUARANTEE MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15).

The holder of this certificate shall be entitled to receive funds from the trust
fund only in the event of the Company's liquidation or if the holder seeks to
convert his respective shares into cash upon a business combination which he
voted against and which is actually completed by the Company. In no other
circumstances shall the holder have any right or interest of any kind in or to
the trust fund.<PAGE>

                                                       Exhibit 4.3

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<S>              <C>                                                                 <C>
   NUMBER                     (SEE REVERSE SIDE FOR LEGEND)                           WARRANTS
_________-     (THIS WARRANT WILL BE VOID IF NOT EXERCISED PRIOR TO 5:00 P.M.
                            NEW YORK CITY TIME, __________, 2008

                     TREMISIS ENERGY ACQUISITION CORPORATION
                                                                                                       CUSIP 894727114
                                                                           WARRANT
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THIS CERTIFIES THAT, for value received

is the registered holder of ____________ Warrants expiring ________, 2008 (the
"Warrant") to purchase one fully paid and non-assessable share of Common Stock,
par value $.0001 per share ("Shares"), of Tremisis Energy Acquisition
Corporation, a Delaware corporation (the "Company"), for each Warrant evidenced
by this Warrant Certificate. The Warrant entitles the holder thereof to purchase
from the Company, commencing on the later of (i) the consummation by the Company
of a merger, capital stock exchange, asset acquisition or other similar business
combination or (ii) __________, 2005, such number of Shares of the Company at
the price of $5.00 per share, upon surrender of this Warrant Certificate and
payment of the Warrant Price at the office or agency of the Warrant Agent,
Continental Stock Transfer & Trust Company (such payment to be made by check
made payable to the Warrant Agent), but only subject to the conditions set forth
herein and in the Warrant Agreement between the Company and Continental Stock
Transfer & Trust Company. The Warrant Agreement provides that upon the
occurrence of certain events the Warrant Price and the number of Warrant Shares
purchasable hereunder, set forth on the face hereof, may, subject to certain
conditions, be adjusted. The term Warrant Price as used in this Warrant
Certificate refers to the price per Share at which Shares may be purchased at
the time the Warrant is exercised.

     No fraction of a Share will be issued upon any exercise of a Warrant. If
the holder of a Warrant would be entitled to receive a fraction of a Share upon
any exercise of a Warrant, the Company shall, upon such exercise, round up to
the nearest whole number the number of Shares to be issued to such holder.

     Upon any exercise of the Warrant for less than the total number of full
Shares provided for herein, there shall be issued to the registered holder
hereof or his assignee a new Warrant Certificate covering the number of Shares
for which the Warrant has not been exercised.

     Warrant Certificates, when surrendered at the office or agency of the
Warrant Agent by the registered holder hereof in person or by attorney duly
authorized in writing, may be exchanged in the manner and subject to the
limitations provided in the Warrant Agreement, but without payment of any
service charge, for another Warrant Certificate or Warrant Certificates of like
tenor and evidencing in the aggregate a like number of Warrants.

     Upon due presentment for registration of transfer of the Warrant
Certificate at the office or agency of the Warrant Agent, a new Warrant
Certificate or Warrant Certificates of like tenor and evidencing in the
aggregate a like number of Warrants shall be issued to the transferee in
exchange for this Warrant Certificate, subject to the limitations provided in
the Warrant Agreement, without charge except for any applicable tax or other
governmental charge.

     The Company and the Warrant Agent may deem and treat the registered holder
as the absolute owner of this Warrant Certificate (notwithstanding any notation
of ownership or other writing hereon made by anyone), for the purpose of any
exercise hereof, of any distribution to the registered holder, and for all other
purposes, and neither the Company nor the Warrant Agent shall be affected by any
notice to the contrary.

     This Warrant does not entitle the registered holder to any of the rights of
a stockholder of the Company.

     The Company reserves the right to call the Warrant, at any time prior to
its exercise, with a notice of call in writing to the holders of record of the
Warrant, giving 30 days' notice of such call at any time after the Warrant
becomes exercisable if the last sale price of the Shares has been at least $8.50
per share on each of 20 trading days within any 30 trading day period ending on
the third business day prior to the date on which notice of such call is given.
The call price of the Warrants is to be $.01 per Warrant. Any Warrant either not
exercised or tendered back to the Company by the end of the date specified in
the notice of call shall be canceled on the books of the Company and have no
further value except for the $.01 call price.

By

---------------------------------        ---------------------------------------
                        Secretary        Chairman of the Board

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                                SUBSCRIPTION FORM
      To Be Executed by the Registered Holder in Order to Exercise Warrants

The undersigned Registered Holder irrevocably elects to exercise ______________
Warrants represented by this Warrant Certificate, and to purchase the shares of
Common Stock issuable upon the exercise of such Warrants, and requests that
Certificates for such shares shall be issued in the name of

_______________________________________________________________________________
                     (PLEASE TYPE OR PRINT NAME AND ADDRESS)
_______________________________________________________________________________

_______________________________________________________________________________

_______________________________________________________________________________
                 (SOCIAL SECURITY OR TAX IDENTIFICATION NUMBER)

and be delivered to ___________________________________________________________
                     (PLEASE PRINT OR TYPE NAME AND ADDRESS)

_______________________________________________________________________________
and, if such number of Warrants shall not be all the Warrants evidenced by this
Warrant Certificate, that a new Warrant Certificate for the balance of such
Warrants be registered in the name of, and delivered to, the Registered Holder
at the address stated below:

Dated: _____________________            ________________________________________
                                        (SIGNATURE)
                                        ________________________________________
                                        (ADDRESS)
                                        ________________________________________

                                        ________________________________________
                                        (TAX IDENTIFICATION NUMBER)

                                   ASSIGNMENT
       To Be Executed by the Registered Holder in Order to Assign Warrants

For Value Received, _______________________ hereby sell, assign, and transfer
unto

_______________________________________________________________________________
                     (PLEASE TYPE OR PRINT NAME AND ADDRESS)
_______________________________________________________________________________

_______________________________________________________________________________

_______________________________________________________________________________
                 (SOCIAL SECURITY OR TAX IDENTIFICATION NUMBER)

and be delivered to ___________________________________________________________
                     (PLEASE PRINT OR TYPE NAME AND ADDRESS)

______________________ of the Warrants represented by this Warrant Certificate,
and hereby irrevocably constitute and appoint _________________________________
Attorney to transfer this Warrant Certificate on the books of the Company, with
full power of substitution in the premises.

Dated: _________________________               _________________________________
                                               (SIGNATURE)

THE SIGNATURE TO THE ASSIGNMENT OF THE SUBSCRIPTION FORM MUST CORRESPOND TO THE
NAME WRITTEN UPON THE FACE OF THIS WARRANT CERTIFICATE IN EVERY PARTICULAR,
WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATSOEVER, AND MUST BE
GUARANTEED BY A COMMERCIAL BANK OR TRUST COMPANY OR A MEMBER FIRM OF THE
AMERICAN STOCK EXCHANGE, NEW YORK STOCK EXCHANGE, PACIFIC STOCK EXCHANGE OR
CHICAGO STOCK EXCHANGE.

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