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Estonia has lots of oil shale (not same thing as shale oil). They never needed to import coal, because they have their own fossil fuel.

https://en.wikipedia.org/wiki/Energy_in_Estonia#Oil-shale

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This is true. A nuance often missed. Different rock (that is considerably worse in several ways, needs heavy fuel oil to be added to actually burn and has I think even higher co2 output per unit of energy) but kinda the same.

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