Norway's Power Push

Imagine generating electricity from the energy a redwood tree exerts when it sucks water up 300 ft. (91 m) to its highest needles. Is there any greener juice than that?

Stein Erik Skilhagen thinks about this sort of thing all the time for Norway’s state-owned power company, Statkraft, where he’s the head of osmotic power.

Yes, osmotic power. Of course you remember studying osmosis. But just in case you’ve forgotten, it’s the passage of a liquid from a region where it’s highly concentrated through a semipermeable membrane to a region of lower concentration, raising the latter’s volume. The by-product of that rising volume is energy.

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Source: Time