Exhibit 10.59


                            LEASE - BUSINESS PROPERTY

      This lease agreement is effective the 1st day of March, 2005 by Maust
Asset Management Co., LLC, a Minnesota limited liability company ("Landlord")
whose address for the purpose of this lease is 5785 Starview Lane, Prior Lake,
MN 55372 and Greenman Technologies of Iowa, Inc., an Iowa corporation ("Tenant")
whose address for the purpose of this lease is 1914 E. Euclid Avenue, Unit "A",
Des Moines, IA 50313.

      1. PREMISES AND TERM. The Landlord, in consideration of the rents,
agreements and conditions herein contained, leases to Tenant and Tenant leases
from Landlord, according to the terms and provisions of this lease, the
following described "premises", situated in Polk County, Iowa:

1. Parcel "H"; see Exhibit A; and
2. Parcel "I"; see section highlighted and marked Parcel "I" on Exhibit "B" to
   be sublet.

with the improvements therein, and all rights, easements and appurtenances,
which, more particularly, includes the space and premises as may be shown on
Exhibit "A" and Exhibit "B", if attached, for a term of 8 (eight) years and 2
(two) months, commencing at midnight of the day previous to the first day of the
issue term, which shall be on the 1st day of March, 2005 and ending at midnight
on the last day of the lease term, which shall be on the 30th day of April,
2013, upon the condition that the Tenant pays rent thereof, and otherwise
performs as in this lease provided.

      2. RENTAL. Tenant agrees to pay to Landlord as rental for said term, as
follows: See paragraph 29(D) on Addendum attached.

      In addition to the above monthly rental Tenant shall also pay: a security
deposit of Three Thousand Five Hundred Dollars ($3,500).

      All sums shall be paid at the address of Landlord, as above designated, or
at such other place as the Landlord may, from time to time, designate in
writing.

      Delinquent payments shall draw interest at 12% per annum from the due date
until paid.

      2. (1). MULTIPLE TENANTS. If any other Tenants in adjoining premises share
responsibility with Landlord and Tenant for any expenses, the percentages
allocated to Landlord and Tenant in this lease shall represent only their
respective portions of the total shared expenses. Therefore, their percentages
may total less than 100%. Nothing shall prevent the Landlord from paying a
Tenant's share of an expense, and billing the Tenant for the amount so paid.
<PAGE>

      2. (2). "TRIPLE NET" PROVISION. (Optional). This provision shall be
applicable. Tenant agrees that all duties and obligations to repair, maintain
and provide utilities and services (paragraphs 6 and 7), to pay taxes and
special assessments (paragraph 10) and to pay for casualty and liability
insurance (paragraph 11) shall be borne solely by Tenant during the term of this
lease. (If the parties select this provision, all duties and obligations set
forth in paragraphs 6, 7, and 10 shall be performed by the Tenant).

      3. POSSESSION. Tenant shall be entitled to possession on the first day of
the term of this lease and shall yield possession to the Landlord at the end of
the lease term, except as herein otherwise expressly provided. Should Landlord
be unable to give possession on said date, Tenant's only damages shall be a
rebating of the pro rate rental.

      4. USE OF PREMISES. Tenant covenants and agrees during the term of this
lease to use and to occupy the leased premises only for tire recycling business
including storage and parking of materials and vehicles.

      5. QUIET ENJOYMENT. Landlord covenants that its estate is in fee simple
and that the Tenant, if not in default, shall peaceably have, hold and enjoy the
premises for the term of this lease. Landlord shall have the right to mortgage
all of its right, title, interest in said premises at any time without notice,
subject to the lease.

      6. EQUIPMENT, DECORATING REPLACEMENT, REPAIR AND MAINTENANCE

                                   DEFINITIONS

"Maintain" means to clean and keep in good condition.

"Repair" means to fix and restore to good condition after damage, deterioration
or partial destruction.

                              CONDITION OF PREMISES

      A. Tenant takes the premises in its present condition, except for such
repairs and alterations as may be expressly otherwise provided in this lease.

                             REPAIRS AND MAINTENANCE

      B. Tenant shall replace and repair the structural parts of the building.
For purposes of this lease, the structural parts of the building shall mean the
foundation, exterior walls, load bearing components of interior floors and
walls, the roof and all sewers, pipes, wiring and electrical fixtures outside of
the structure.


<PAGE>

      C. Repairs shall be performed and paid for by the parties as follows:

                                                 PERFORMANCE         PAYMENT
                                                 -----------         -------
                                                 L=Landlord
                                                 T=Tenant     %Landlord  %Tenant

Interior walls, floors and ceilings                   T           0        100
Sewer, plumbing fixtures, pipes, wiring
  electrical fixtures within the structure            T           0        100
Heating equipment                                     T           0        100
Air conditioning equipment                            T           0        100
Plate glass (replacement)                             T           0        100
Sidewalks                                             T           0        100
Parking areas                                         T           0        100
Other common areas                                    T           0        100

      D. Tenant shall be responsible for maintenance of all common areas.

      E. Any repair or maintenance not specifically provided for above shall be
performed and paid for by Tenant.

      F. Each party shall perform their responsibilities of repair and
maintenance to the end that the premises will be kept in a safe and serviceable
condition. Neither party will permit nor allow the premises to be damaged or
depreciated in value by any act, omission to act, or negligence of itself, its
agents or employees.

                      EQUIPMENT, DECORATING AND ALTERATIONS

      G. The following items of equipment, furnishings and fixtures shall be
supplied and replaced by the parties as follows:

                                    SUPPLIED                REPLACED
                                    --------                --------
                                    L=Landlord              L=Landlord
                                    T=Tenant                T=Tenant

Heating equipment                  ___________             ____________
Air conditioning equipment         ___________             ____________
Carpeting/floor covering           ___________             ____________
Drapes, shades, blinds             ___________             ____________

      Any similar equipment, furnishings and fixtures not specifically provided
and paid for by Tenant.

Any equipment, furnishings or fixtures to be supplied by Tenant shall be subject
to the Landlord's prior written approval as to qualify and method of
installation. Tenant shall provide all trade equipment, furnishings and fixtures
used in connection with the operation of its business, such as telephones,
computers, desks, chairs, shelving and similar items.

<PAGE>

      H. Landlord shall provide and pay for the following items of interior
decorating:

Thereafter, Tenant shall be responsible for all interior decorating. Tenant
shall make no structural alterations or improvements without the prior written
consent of the Landlord, which shall not be unreasonably withheld.

                         AMERICANS WITH DISABILITIES ACT

      I. Tenant will make no unlawful use of said premises and agrees to comply
with all valid regulations of the Board of Health, City Ordinances or applicable
municipality, the laws of the State of Iowa and the Federal government, but this
provision shall not be construed as creating any duty by Tenant to members of
the general public; provided, however, responsibility for compliance with the
Americans with Disabilities Act shall be performed and paid for by the parties
as follows:

                                    %Landlord                %Tenant
                                    ---------                -------
Common areas                            0                       100
Tenants area:
     Initial compliance (specify)       0                       100
     Future compliance                  0                       100

      7. UTILITIES AND SERVICES. Utilities and services shall be furnished and
paid for by the parties as follows:

                                    FURNISHED          PAYMENT
                                    ---------          -------
                                    L=Landlord
                                    T=Tenant    %Landlord   %Tenant

Electricity                             T           0          100
Gas                                     T           0          100
Water and Sewer                         T           0          100
Garbage/Trash                           T           0          100
Janitor/Cleaning                        T           0          100
Common areas                            T           0          100
Other:
     Telecommunications                 T           0          100
     Snow and ice Removal               T           0          100

      8. TERMINATION, SURRENDER OF PREMISES AT END OF TERM - REMOVAL OF FIXTURES

            (a) TERMINATION. This lease shall terminate upon expiration of the
original term; or if this expressly provides for any option to renew, and if any
such option is exercised by the Tenant, then this lease will terminate at the
expiration of the option term or terms.

            (c) SURRENDER. Tenant agrees that upon the termination of this lease
it will surrender and deliver the premises in good and clean condition, except
the effects of ordinary wear and tear and depreciation arising from lapse of
time, or damage without fault or liability of Tenant.

<PAGE>

            (d) HOLDING OVER. Continued possession by Tenant, beyond the
expiration of its tenancy coupled with the receipt of the specified rental by
the Landlord (and absent a written agreement by both parties for an extension of
this lease, or for a new lease) shall constitute a month to month extension of
this lease.

            (e) REMOVAL OF FIXTURES. Tenant may, at the expiration of its
tenancy, if Tenant is not in default, remove any fixtures or equipment which
Tenant has installed in the premises, providing Tenant repairs any and all
damages caused by removal.

      9. ASSIGNMENT AND SUBLETTING. Any assignment of this lease or subletting
of the premises or any part thereof, without the Landlord's prior written
permission shall, at the option of the Landlord, make the rental for the balance
of the lease term due and payable at once. Such written permission shall not be
unreasonably withheld.

      10. REAL ESTATE TAXES.

            A. All installments of real estate taxes would become delinquent if
not paid during the term of this lease, shall be paid by the parties in the
following proportions:

            Landlord  0%                  Tenant   100%

            B. Any increase in such installments that exceeds the amount of the
installment that would be delinquent if not paid by 9/30/2005 shall be paid as
follows:

            Landlord   0%                          100%

            C. PERSONAL PROPERTY TAXES. Tenant agrees to timely pay all taxes,
assessments or other public charges levied or assessed by lawful authority
against the personal property on the premises during the term of the lease.

            D. SPECIAL ASSESSMENTS. Special assessments that would be delinquent
if not paid during the term of this lease shall be timely paid by the parties in
the following proportions:

            Landlord   0%                 Tenant   100%

            E. Each Party reserves its right of protest of any assessment of
taxes.

      11. INSURANCE.

            A. PROPERTY INSURANCE. Landlord and Tenant agree to insure their
respective real and personal property for the full insurable value. Such
insurance shall cover losses. Included in the Insurance Services Office Broad
Form Causes of Loss (formerly fire and extended coverage). To the extent
permitted by their policies the Landlord and Tenant waive all rights of recovery
against each other.

<PAGE>

See Paragraph 29(F) on Addendum attached.

            B. LIABILITY INSURANCE. Tenant shall obtain commercial general
liability insurance in the amounts of $1,000,000.00 each occurrence and
$10,000,000.00 annual aggregate per location. Such policy shall include
liability arising from premises operations, independent contractors, personal
injury, products and completed operations and liability assumed under an insured
contract. This policy shall be endorsed to include the Landlord as an additional
insured.

            C. CERTIFICATES OF INSURANCE. Prior to the time the lease takes
effect the Tenant will provide the Landlord with a certificate of insurance with
these property and liability insurance requirements, such certificate shall
include 30 days advance notice of cancellation to the Landlord. A renewal
certificate shall be provided prior to expiration of the current policies.
Landlord shall be named as an additional insured in each of such policies.

            D. ACTS BY TENANT. Tenant will not do or omit doing any act which
would invalidate any insurance, or increase the insurance rates in force on the
premises.

            E. RECOMMENDATIONS - IOWA INSURANCE SERVICES OFFICE. Tenant further
agrees to comply with recommendations of Iowa Insurance Services Office and to
be liable for and to promptly pay, as if current rental, any increase in
insurance rates on said premises and on the building of which said premises are
part, due to increased risks or hazards resulting from Tenant's use of the
premises otherwise than as herein contemplated and agreed.

            F. Landlord and Tenant shall each provide a copy of this lease to
their respective insurers.

      12. LIABILITY FOR DAMAGE. Each party shall be liable to the other for all
damage to the property of the other negligently, recklessly or intentionally
caused by that party (or their agents, employees or invitees), except to the
extent the loss is insured and subrogation is waived under the owner's policy.

      13. INDEMNITY. Except as provided in paragraph 21(A)(5) and except for the
negligence of Landlord, Tenant will protect, defend and indemnify Landlord from
and against any and all loss, costs, damage and expenses occasioned by or
arising out of, any accident or other occurrence, causing or inflicting injury
or damage to any person or property, happening or done in, upon or about the
premises, or due directly or indirectly to the tenancy use or occupancy thereof,
or any part thereof by Tenant or any person claiming through or under Tenant.

      14. FIRE AND CASUALTY. (a) PARTIAL DESTRUCTION OF PREMISES. In the event
of a partial destruction or damage of the premises, which is a business
interference which prevents the conducting of a normal business operation and
which damage is reasonably repairable within sixty (60) days after its
occurrence, this lease shall not terminate but the rent for the premises shall
abate during the time of such business interference. In the event of a partial
destruction, Landlord shall repair such damages within sixty (60) days of its
occurrence unless prevented from doing so by acts of God, government regulations
or other causes beyond Landlord's reasonable control..

<PAGE>

            (b) ZONING. Should the zoning ordinance of the municipality in which
this property is located make it impossible for Landlord to repair or rebuild so
that Tenant is not able to conduct its business on these premises, then such
partial destruction shall be treated as a total destruction as provided in the
next paragraph.

            (c) TOTAL DESTRUCTION OF BUSINESS USE. In the event of a destruction
or damage of the leased premises including the parking area (if parking area is
part of this lease) so that Tenant is not able to conduct its business on the
premises or the then current legal use for which the premises are being used and
which damages cannot be repaired within sixty (60) days this lease may be
terminated at the option of either the Landlord or Tenant. Such termination in
such event shall be affected by written notice of one party to the other, within
30 (thirty) days after such destruction. Tenant shall surrender possession
within ten (10) days after such notice issues and each party shall be released
from all future obligations, and Tenant shall pay rent pro rata only to the date
of such destruction. In the event of such termination of this lease, Landlord at
its option, may rebuild or not, at its discretion.

      15. CONDEMNATION.

            (a) DISPOSITION OF AWARDS. Should the whole or any part of the
premises be condemned or taken for any public or quasi-public purpose. each
party shall be entitled to retain, as its own property, any award payable to it.
Or in the event that a single entire award is made on account of the
condemnation, each party will then be entitled to take such proportion of said
award as may be fair and reasonable.

            (b) DATE OF LEASE TERMINATION. If the whole of the demised premises
shall be so condemned or taken, the Landlord shall not be liable to the Tenant
except and as its rights are preserved as in paragraph 14 (a)above.

      16. DEFAULT, NOTICE OF DEFAULT AND REMEDIES.

                                EVENTS OF DEFAULT

          A. Each of the following shall constitute and event of default by
Tenant:

                  1. Failure to pay rent when due.

                  2. Failure to observe or perform any duties, obligations,
agreements or conditions imposed on Tenant pursuant to the terms of the lease.

                  3. Abandonment of the premises. "Abandonment" means the Tenant
has failed to engage in its usual and customary business activities on the
premises for more than fifteen (15) consecutive business days.

<PAGE>

                  4. Institution of voluntary bankruptcy proceedings by Tenant;
institution of involuntary bankruptcy proceedings in which the Court orders
relief against the Tenant as a debtor; assignment for the benefit of creditors
of the interest of Tenant under this lease agreement; appointment of a receiver
for the property or affairs of Tenant where the receivership is not vacated
within ten (10) days after the appointment of the receiver.

                                NOTICE OF DEFAULT

            B. Landlord shall give Tenant a written notice specifying the
default and giving the Tenant ten (10) days in which to correct the default. If
there is a default (other than for nonpayment of a monetary obligation of
Tenant, including rent) that cannot be remedied in ten (10) days by diligent
efforts of the Tenant, Tenant shall propose an additional period of time in
which to remedy the default. Consent to additional time shall not be
unreasonably withheld by Landlord. Landlord shall not be required to give Tenant
any more than two notices for the same default within any 365 day period.

                                    REMEDIES

            C. In the event Tenant has not remedied a default in a timely manner
following a Notice of Default, Landlord may proceed with all available remedies
at law or in equity, including but not limited to the following:

                  1. Termination. Landlord may declare this lease to be
terminated and shall give Tenant a written notice of such termination. In the
event of termination of this lease, Landlord shall be entitled to prove claim
for and obtain judgment against Tenant for the balance of the rent agreed to be
paid for the term herein provided, plus all expenses of Landlord in regaining
possession of the premises and the reletting thereof, including attorney's fees
and court costs, crediting against such claim, however, any amount obtained by
reason of reletting.

                  2. Forfeiture. If a default is not remedied in a timely
manner, Landlord may then declare this lease to be forfeited and shall give
Tenant a written notice of such forfeiture, and may, at the time, give Tenant
the notice to quit provided for in Chapter 648 of the Code of Iowa.

      17. RIGHT OF EITHER PARTY TO MAKE GOOD ANY DEFAULT OF THE OTHER. If
default shall be made by either party in the performance of, or compliance with,
any of the terms or conditions of this lease, and such default shall have
continued for thirty (30) days after written notice thereof from one party to
the other, the person aggrieved, in addition to all other remedies provided by
law, may, but need not, perform such term or condition or make good such default
and any amount advanced shall be repaid forthwith on demand, together with the
interest rate of 12% per annum, from the date of advance.

      18. SIGNS. (a) Tenant shall have the right of attaching, painting or
exhibiting signs on the leased premises, provided only (1) that any sign shall
comply with the ordinances of municipality in which the property is located and
the laws of the State of Iowa; (2) such sign shall not change the structure of
the building; (3) such sign, if and when removed, hall not damage the building;
and (4) such sign shall be subject to the prior written approval of the
Landlord, which approval shall not be unreasonably withheld.

<PAGE>

            (b) Landlord during the last ninety (90) days of this lease, or
extension, shall have the right to maintain in the windows or on the building or
on premises either or both a "For Rent" or "For Sale" sign and Tenant will
permit, at such time, prospective tenants or buyers to enter and examine the
premises.

      19. MECHANIC'S LIENS. Neither the Tenant nor anyone claiming by, through,
or under the Tenant, shall have the right to file or place any mechanic's liens
or other lien of any kind or character whatsoever, upon the premises or upon any
building or improvement, or upon the leasehold interest of the Tenant, and
notice is hereby given that no contractor, sub-contractor, or anyone else who
may furnish any material service or labor for any building, improvements,
alteration, repairs or any part thereof, shall at any time be or become entitled
to any lien on the premises, and for the further security of the Landlord, the
Tenant covenants and agree to give actual notice thereof in advance, to an and
all contractors and sub-contractors who may furnish or agree to furnish any such
material service or labor.

      20. LANDLORD'S LIEN AND SECURITY INTEREST. (a) Landlord shall have, in
addition to any lien given by the law, a security interest as provided by the
Uniform Commercial Code of Iowa, upon all personal property and all
substitutions thereof, kept and used on said premises by Tenant. Landlord may
proceed at law or in equity with any remedy provided by law or by this lease for
the recovery of rent, or for termination of this lease because of Tenant's
default in its performance. See Paragraph 29(A) on Addendum attached.

      21. ENVIRONMENTAL.

            A. Landlord. To the best of the Landlord's knowledge to date:

                  1. Neither Landlord nor Landlord's former or present tenants
are subject to any investigation concerning the premises of any governmental
authority under any applicable federal, state or local codes, rules and
regulations pertaining to air and water quality, the handling, transportation,
storage, treatment, usage or disposal of toxic or hazardous substances, air
emissions, other environmental matters, and all zoning and other land use
matters.

                  2. Any handling, transportation, storage, treatment, or use of
toxic or hazardous substances that has occurred on the premises has been in
compliance with all applicable federal, state, and local codes, rules and
regulations.

                  3. No leak, spill release, discharge, emission or disposal of
toxic or hazardous substances has occurred on the premises.

                  4. The soil, groundwater, and soil vapor on or under the
premises is free of toxic or hazardous substances.

<PAGE>

                  5. Landlord shall assume liability and shall indemnify and
hold Tenant harmless against all liability or expense arising from any condition
which existed, whether known or unknown, at the time of execution of the lease
which condition is not a result of actions of the Tenant or which condition
arises after date of execution but which is not a result of actions of the
Tenant.

            B. Tenant. Tenant expressly represents and agrees:

                  1. During the lease term, Tenant's use of the property will
not include the use of any hazardous substances without Tenant first obtaining
the written consent of Landlord. Tenant understands and agrees that Landlord's
consent is at Landlord's sole option and complete discretion and that such
consent may be withheld or may be granted with any conditions or requirements
that Landlord deems appropriate.

                  2. During the lease term, Tenant shall be fully liable for all
costs and expenses related to the use, storage, removal and disposal of
hazardous substances used or kept on the property by Tenant and Tenant shall
give immediate notice to Landlord of any violation or any potential violation of
any environmental regulation, rule, statue or ordinance relating to the use,
storage or disposal of any hazardous substance.

                  3. Tenant, at its sole cost and expense, agrees to remediate,
correct or remove from the premises any contamination of the property caused by
any hazardous substances which have been used or permitted by Tenant on the
premises during any term of this lease. Remediation, correction or removal shall
be in a safe and reasonable manner, and in conformance with all applicable laws,
rules and regulations. Tenant reserves all rights allowed by law to seek
indemnity or contribution from any person, other than Landlord, who is or may be
liable for any such cost and expense.

                  4. Tenant agrees to indemnify and hold Landlord harmless from
and against all claims, causes of action, damages, loss, costs, expense,
penalties, fines, lawsuits, liabilities, attorney fees, engineering and
consulting fees, arising out of or in any manner connected with hazardous
substances, which are caused or created by Tenant on or after the date of this
lease and during any term of this lease, including but not limited to, injury or
death to persons or damage to property, and including any diminution of the
value of any leased premises which may result from the foregoing. This indemnity
shall survive the cessation, termination, abandonment or expiration of this
lease.

      22. SUBSTITUTION OF EQUIMENT, MERCHANDISE, ETC. (a) During its tenancy,
the Tenant shall have the right to sell or otherwise dispose of any personal
property of the Tenant situated on the premises, when in the judgment of the
Tenant it shall have become obsolete, outworn, or unnecessary in connection with
the operation of the business on the premises; provided, however, that the
Tenant shall, in such instances (unless no substituted article or item is
necessary) at its own expense, substitute for such items a new or other item in
substitution thereof, in like or greater value.

<PAGE>

            (b) Nothing herein contained shall be construed as denying to Tenant
the right to dispose of inventoried merchandise in the ordinary course of the
Tenant's trade or business.

      23. RIGHTS CUMULATIVE. The various rights, powers, options, elections and
remedies of either party, provided in this lease, shall be construed as
cumulative and no one of them as exclusive of the others, or exclusive of any
rights, remedies or priorities allowed either party by law, and shall in no way
affect or impair the right of either party to pursue any other equitable or
legal remedy to which either party may be entitled as long as any default
remains in any way unremedied, unsatisfied or undischarged.

      24. NOTICES AND DEMANDS. Notices as provided for in this lease shall be
given to the respective parties hereto at the respective addresses designated on
page one of this lease unless either party notifies the other, in writing, of a
different address. Without prejudice to any other method of notifying a party in
writing or making a demand or other communication, such message shall be
considered given under the terms of this lease when sent, addressed as above
designated, postage prepaid, be certified mail deposited in a United States mail
box.

      25. PROVISIONS TO BIND AND BENEFIT SUCCESSORS, ASSIGNS, ETC. Each and
every covenant and agreement herein contained shall extend to and be binding
upon the respective successors, heirs, administrators, executors and assigns of
the parties; except that if any part of this lease is held in joint tenancy, the
successor in interest shall be the surviving joint tenant.

      26. CHANGES TO BE IN WRITING. None of the covenants, provisions, terms or
conditions of this lease shall be modified, waived or abandoned, except by a
written instrument duly signed by the parties. This lease contains the whole
agreement of the parties.

      28. CONSTRUCTION. Words and phrases herein, including acknowledgement
hereof, shall be construed as in the singular or plural number, and as
masculine, feminine or neutral gender according to the context.

      29. See Additional terms and conditions on Addendum attached hereto and by
this reference made a part hereof.


Greenman Technologies of Iowa, Inc.       Maust Asset Management Co., LLC

By   /s/ Robert H. Davis                  By  /s/ Mark Maust
     Robert Davis                             Mark Maust
Title: Vice President                     Title: Managing Member

<PAGE>

                                    Exhibit A

1.    Parcel "H" of Section 24, Township 79 North, Range 24 West of the 5th
      P.M., all being in and forming a part of the City of Des Moines, Polk
      County, Iowa, more particularly described as follows: Commencing at the
      Southeast Corner of said Section 24; THENCE North 90 degrees West, along
      the South line of said Section 24, a distance of 1094.31 feet, to the
      Southwest Corner of Parcel "G" of said Section 24, Recorded in Polk County
      Recorder's Book 9575, Page 711, filed January 16, 2003, said point also
      being on the East Right of Way (R.O.W.) line of Chicago Rock Island and
      Pacific Railroad (C.R.I.P.R.R.); THENCE North 0 degrees 10' 12" East,
      along the West line of said Parcel "G", a distance of 747.46 feet, to the
      Northwest Corner of said Parcel "G", said point also being the POINT OF
      BEGINNING; THENCE continuing North 0 degrees 10' 12" East, along said East
      R.O.W. line of C.R.I.P.R.R., a distance of 502.25 feet; THENCE South 90
      degrees East, a distance of 198.40 feet; THENCE South 11 degrees 01' 31"
      East, a distance of 295.43 feet; THENCE South 3 degrees 34' 48", a
      distance of 201.84 feet, to the Northeast Corner of said Parcel "G";
      THENCE South 87 degrees 41' 45" West, along the North line of said Parcel
      "G", a distance of 269.21 feet, to the Northwest Corner of said Parcel
      "G", said point also being the POINT OF BEGINNING, containing 2.758 acres,
      more or less.

<PAGE>

                                    Exhibit B


                               [Plot plan omitted]

<PAGE>

                           ADDENDUM TO LEASE AGREEMENT

      29. ADDITIONAL TERMS AND CONDITIONS:

      The Lease includes the following additional terms and conditions:

            A. For purposes of paragraph 20(a) of the Lease, Tenant creates,
provides for, grants, transfers and conveys to Landlord a lien and security
interest, as provided by the Uniform Commercial Code of Iowa, upon all personal
property of Tenant, and all accessions and additions thereto, and all
replacements, substitutions and proceeds thereof, kept and used on the premises
by Tenant at any time during the Lease, or any extension thereof. Tenant hereby
authorizes Landlord to file such financing statements and continuation
statements as Landlord may determine in order to perfect such security interest.
In the event this Lease is terminated by Tenant's default, Landlord may
immediately re-enter and resume possession of the premises and take possession
of all of the aforesaid personal property, as to which Landlord shall have all
of the rights and remedies of a secured party under the Uniform Commercial Code
in effect in Iowa. Tenant agrees that any required written notice sent by
Landlord at least ten (10) days in advance of any action shall be deemed to be
reasonable for all purposes. Furthermore, Tenant agrees to execute upon request
by Landlord a Memorandum of this Lease containing such information concerning
this Lease as Landlord may reasonably determine. Tenant authorizes Landlord to
file such Memorandum of Lease.

            B. Estoppel Certificates. Tenant, from time to time, upon written
request from Landlord, agrees to execute, acknowledge and deliver to Landlord
within ten (10) days from Landlord's request, in form and substance satisfactory
to Landlord but subject to such modifications as Landlord's mortgagee may
reasonably require, a written statement certifying that Tenant has accepted the
premises, that this Lease is unmodified and in full force and effect (or, if
there have been modifications, that this Lease is in full force and effect as
modified, setting forth the modifications), that Landlord is not in default
hereunder, the date to which the rent and other amounts payable by Tenant have
been paid in advance, if any, and such additional facts as may be required by
Landlord or Landlord's mortgagee. Tenant understands and agrees that Landlord
any prospective purchaser of the premises, any current or prospective mortgagee
of the premises and their respective successors and assigns, may rely upon any
such statement delivered pursuant to this paragraph.

            C. Subordination. This Lease Agreement and all rights of the tenant
under this Lease Agreement shall be subject and subordinate to the lien of any
and all mortgages that affect the property covered by this Lease Agreement or
any part of the leased property, and to any and all new mortgages, renewals,
modifications or extensions of any mortgages. Tenant shall, on demand, execute,
acknowledge and deliver to the Landlord any and all instruments that may be
necessary or proper to subordinate this Lease Agreement and all rights in this
Lease Agreement to the lien of any such mortgage or mortgages. The parties agree
that each shall cooperate with any lenders in obtaining non-disturbance
agreements.

<PAGE>

            D. Tenant agrees to pay to Landlord as Minimum Rent for the
premises, without notice, setoff, or demand, the monthly amounts set forth
below:

      Month of Term                            Monthly Minimum Rental
      -------------                            ----------------------
      March 1, 2005 to March 31, 2008                 $3,500.00
      April 1, 2008 to April 30, 2013                 $3,500.00

      Said monthly payments shall be due and payable by Tenant in advance on the
first day of each calendar month during the term of this Lease Agreement, or any
extension or renewal thereof, at the office of Landlord.

            E. REAL ESTATE TAXES. Tenant shall pay, as Additional Rent, all real
estate taxes and all assessments for special improvements and any taxes in lieu
thereof which may be levied or assessed upon the Real Property payable in any
year within the Lease Term and any extension thereof. Taxes and installments of
special assessments payable during any partial year of the Lease Term and any
extensions thereof shall be prorated on a calendar year basis. At the option of
the Landlord, this Additional Rent shall be due and payable with the Minimum
Rent in advance in equal monthly installments equal to one-twelfth (1/12th) of
such taxes and assessments due and payable during the then calendar year.

            F. Tenant shall purchase at Tenant's expense property insurance with
a minimum coverage amount of $1.5 million pursuant to Paragraph 11 of this
Lease. Tenant shall procure the insurance policies required under paragraph 11
of this Lease from insurance companies acceptable to Landlord.

            G. WAIVER OF JURY TRIAL. EACH OF THE PARTIES TO THIS LEASE WAIVES
THE RIGHT TO TRIAL BY A JURY OF ANY MATTERS ARISING OUT OF THIS LEASE. Each of
the parties to this Lease agrees that in the event any party to this Lease
commences an action to enforce the terms of this Lease or for breach of this
Lease, such action shall be venued in either the United States District Court
sitting in Polk County, Iowa or in the Iowa District Court in and for Polk
County, Iowa.

            H. Before commencement of any work by Lessee, all Plans and
Specifications shall be filed with and approved by all government departments or
authorities having jurisdiction over such matters, and all work shall be done in
accordance with the requirements of local regulations. The Plans and
Specifications for any alterations estimated to cost $5,000 or more, shall be
submitted to Lessor for prior written approval (which approval shall not be
unreasonably withheld or delayed) prior to commencing work. Alterations shall be
performed in a workmanlike manner and shall not weaken or impair the structural
strength or lessen the value of the building.

<PAGE>


Signed this 14th day of March, 2005       Signed this 25th day of March, 2005

MAUST ASSET MANAGEMENT CO., LLC           GREENMAN TECHNOLOGIES OF IOWA, INC.


By: /s/ Mark Maust                        By: /s/ Robert H. Davis
    Mark Maust                                Robert Davis
    Title: Managing Member                    Title: Vice President
LANDLORD                                  TENANT