Exhibit 10.1

AMENDMENT TO PLACEMENT WARRANT PURCHASE AGREEMENT

This AMENDMENT TO PLACEMENT WARRANT PURCHASE AGREEMENT, dated as of October 20,
2009 (this “Amendment”), is by and among NRDC ACQUISITION CORP., a Delaware
corporation (the “Company”), and NRDC CAPITAL MANAGEMENT, LLC, a Delaware
limited liability company (the “Purchaser”). Capitalized terms used but not
defined herein shall have the respective meanings given to such terms in the
Placement Warrant Purchase Agreement referenced below.

RECITALS

WHEREAS, the Purchaser and the Company entered into a Placement Warrant Purchase
Agreement, dated as of October 2, 2007 (the “Placement Warrant Purchase
Agreement”);

WHEREAS, in the Placement Warrant Purchase Agreement, the parties agreed that
the Company would sell, and the Purchaser would purchase, in a private
placement, Warrants substantially identical to the warrants being issued in the
IPO pursuant to the terms and conditions thereof and as set forth in the
Registration Statement; and

WHEREAS, the parties desire to amend the Placement Warrant Purchase Agreement in
certain respects.

NOW, THEREFORE, in consideration of the foregoing and other good and valuable
consideration, the receipt and adequacy of which are hereby acknowledged, the
Company and the Purchaser agree as follows:

1. Amendments. The Placement Warrant Purchase Agreement is hereby amended as
follows:

(a) The last sentence of Section 3.1 of the Placement Warrant Purchase Agreement
is hereby deleted in its entirety and replaced with the following:

For purposes of this Agreement, “Business Combination” shall mean a (i) the
Company’s initial acquisition of one or more operating businesses through a
merger, capital stock exchange, stock purchase, asset acquisition or other
similar business combination or (ii) the consummation of substantially all of
the transactions contemplated by the Framework Agreement, dated as of August 7,
2009, between the Company and Purchaser, either of which will require that a
majority of the Company’s shares of common stock voted by the Company’s public
stockholders (as described in the Registration Statement) are voted in favor of
the transaction and less than 30% of the Company’s public stockholders both vote
against the proposed transaction and exercise their conversion rights (as
described in the Registration Statement).

2. No Other Changes. Except as expressly set forth herein, the Placement Warrant
Purchase Agreement remains in full force and effect.

3. Counterparts. This Amendment may be executed in counterparts, each of which
shall be deemed an original, but all of which together shall constitute one and
the same instrument.

4. Governing Law. THIS AMENDMENT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD FOR ANY OF THE
CONFLICTS OF LAWS PRINCIPLES THEREOF THAT WOULD RESULT IN THE APPLICATION OF THE
LAWS OF ANY OTHER JURISDICTION.

[Remainder of this page is intentionally left blank.]

 

--------------------------------------------------------------------------------

IN WITNESS WHEREOF, the parties have executed this Amendment as of the date
first written above.

NRDC ACQUISITION CORP.

By:

 

/s/ Richard A. Baker

--------------------------------------------------------------------------------

Name: Richard A. Baker
Title: Chief Executive Officer
 

NRDC CAPITAL MANAGEMENT, LLC

By:

 

 

/s/ Richard A. Baker

--------------------------------------------------------------------------------

Name: Richard A. Baker
Title: Chief Executive Officer
 

 

2

--------------------------------------------------------------------------------