One of the finest things oil and energy minister Terje Aasland (Ap) knows about in Norwegian nature is high-voltage pylons. But because these are already running at full capacity, the minister is now also looking at the potential for more rock and district heating.

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The terawatt hours under our feet. Geothermal energy has enormous potential to allow us to save both electricity and grid development.

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Right under our feet lies enough energy to cover large parts of the country's heating needs. Best of all, it is emission-free and renewable.

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The climate summit in Glasgow once again highlights the need for major efforts in the rapid development and commercialization of renewable energy solutions. Greenhouse gas emissions must be reduced and the temperature rise on the planet must be restricted.

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There is more than hydropower and wind power.

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