EXHIBIT 99.1
JOINT FILING AGREEMENT
Each of the undersigned hereby agrees that this Amendment No. 19 to the statement on Schedule 13D is being filed with the United States Securities and Exchange Commission on behalf of each of the undersigned pursuant to Rule 13d-1(k) under the United States Securities Exchange Act of 1934, as amended.
Dated: October 31, 2016
Glencore AG | |||
By: | /s/ Patrick Huber | ||
Name: | Patrick Huber | ||
Title: | Officer | ||
By: | /s/ Andreas Hubmann | ||
Name: | Andreas Hubmann | ||
Title: | Director |
Glencore International AG | |||
By: | /s/ Andreas Hubmann | ||
Name: | Andreas Hubmann | ||
Title: | Director | ||
By: | /s/ Shaun Teichner | ||
Name: | Shaun Teichner | ||
Title: | Officer |
Glencore plc | |||
By: | /s/ John Burton | ||
Name: | John Burton | ||
Title: | Company Secretary |