LIMITED POWER OF ATTORNEY

      KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes
and appoints P. Kelly Tompkins, Carolyn E. Cheverine, James D. Graham, Madeline
M. Costanzo, and Keirsten Riedel and each of them, as the true and lawful
attorney or attorneys-in-fact, with full power of substitution and revocation,
for the undersigned and in the name, place and stead of the undersigned, in any
and all capacities, to execute, on behalf of the undersigned any and all
statements or reports considered necessary or advisable under Section 16(a) of
the Securities Exchange Act of 1934 and the rules and regulations promulgated
thereunder, as amended from time to time ("Exchange Act") with respect to the
beneficial ownership of shares of Common Stock, par value $.125 per share, of
Cliffs Natural Resources Inc. ("Company"), including, without limitation, all
initial statements of beneficial ownership on Form 3; all statements of changes
in beneficial ownership on Form 4; all annual statements of beneficial ownership
on Form 5; and all notices of proposed sale of securities on Form 144; and any
and all other documents that may be required, from time to time, to be filed
with the Securities and Exchange Commission, to execute any and all amendments
or supplements to any such statements or forms, and to file the same, with all
exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, granting to said attorney or
attorneys-in-fact, and each of them, full power and authority to do so and
perform each and every act and thing requisite and necessary to be done in and
about the premises, as fully to all intents and purposes as the undersigned
might or could do in person, hereby ratifying and confirming all that said
attorney or attorneys-in-fact or any of them or their substitutes, may lawfully
do or cause to be done by virtue hereof.

      The undersigned acknowledges that neither the Company nor such
attorney-in-fact assumes (i) any liability for the undersigned's responsibility
to comply with the requirement of the Exchange Act, (ii) any liability of the
undersigned for any failure to comply with such requirements, or (iii) any
obligation or liability of the undersigned for profit disgorgement under Section
16(b) of the Exchange Act.  This Power of Attorney does not relieve the
undersigned from responsibility for compliance with the undersigned's
obligations under the Exchange Act, including without limitation the reporting
requirements under Section 16 of the Exchange Act.

      This Power of Attorney shall remain in full force and effect as long as
the undersigned is subject to the reporting requirements of Section 16 with
respect to the undersigned's holdings 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 10th day of January, 2012.


/s/ Susan M. Green
Director