Alcoa 2010 Annual Report Download - page 176
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Exhibit 23
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (333-149623),
Form S-4 (No. 333-141419), and Form S-8 (Nos. 33-60305, 333-27903, 333-62663, 333-79575, 333-32516,
333-36208, 333-37740, 333-39708, 333-106411, 333-128445, 333-146330, 333-153369, 333-155668, 333-159123,
333-168428, and 333-170801) of Alcoa Inc. and its subsidiaries of our report dated February 17, 2011 relating to the
consolidated financial statements and the effectiveness of internal control over financing reporting, which appears in
this Form 10-K.
Pittsburgh, Pennsylvania
February 17, 2011
168