In March 2005, Brazilian miner Vale secured an explorationcontract and began work on feasibility studies for an iron ore mine — a complex undertaking due to environmental concerns.
Other tasks under the contract include improvement of electric motor efficiency, integration of solar cells into aircraft wings, and the exploration of hydrogen storage technologies.
合同框架下的其他任务包括，改善电力马达效率、在机翼上集成太阳能电池并探索氢存储技术。
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Under the contract, either they are allowed to lift the gold or they have to be compensated for their exploration costs.