Aidu open cast oil-shale mine and its impact (Estonia)

[Eeva Kirsipuu- VadiKeymaster - 15 December 2017 at 16:47 Post count: 20]

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Oli-shale is one of the most important natural resources in Estonia. In 2017 about 85% of the enery used comes from oil-shale. The mining and benefica
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