Greenrock, BHP secure geothermal permits

West Perth-based Green Rock Energy, in a joint venture with BHP Billiton Worsely Alumina Pty Ltd, has been granted three new geothermal exploration permits in the Collie Basin.

The announcement is below:

Collie Basin Geothermal Permits granted

Green Rock Energy is pleased to announce that three new Geothermal Exploration Permits (Permits) in Western
Australia have been granted jointly to the Company and BHP Billiton Worsley Alumina Pty Ltd. These Permits cover
three blocks within the Collie Basin, with Green Rock Energy being appointed operator for all three. A substantial
proportion of Perth's electricity supply is generated from power stations in the Collie Basin.

Green Rock Energy is pleased to be involved with these Permits. The objective is to prove the technical and
commercial viability of recovering geothermal energy from the Permits, contributing to a reduction in the carbon
footprint from existing local operations.