EX-1 2 v217573_ex1.htm

Unassociated Document

EXHIBIT 1

JOINT FILING AGREEMENT

Each of the undersigned hereby agrees that this Amendment No. 15 to the statement on Schedule 13D is being filed with the Securities and Exchange Commission on behalf of each of the undersigned pursuant to Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.

Dated: April 5, 2011

	Glencore International AG
	By:	/s/ Barbara Bodmer	/s/ Stefan Peter
	Name:	Barbara Bodmer	Stefan Peter
	Title:	Officer	Officer
	Glencore Holding AG
	By:	/s/ Andreas Hubmann	/s/ Steven Kalmin
	Name:	Andreas Hubmann	Steven Kalmin
	Title:	Director	Director
	Glencore AG
	By:	/s/ Barbara Bodmer	/s/ Stefan Peter
	Name:	Barbara Bodmer	Stefan Peter
	Title:	Officer	Officer