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Might Norwegian hydro be less polluting than Costa Rican? I am thinking of lower CO2 sequestration in northern versus (sub)tropical climate forests.

Flood a forest for a dam, and you have less sequestration...

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I believe Norway produces 140TWatt-Hr per year vs Costa Rica 9 GWatt-Hr per year. Norway produces a lot of aluminum that takes a lot of power to produce. Is this right 14 thousand times as much power generated by hydro in Norway than Costa Rica? National statistics can be very misleading.

I was actually wondering about CO2 sequestration per flooded unit of surface of forest...

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