Twelve years after he first dreamed of his Solspeil, a German company specializing in so-called CSP  concentrated solar power  helicoptered in the three 17-sq-m glass mirrors that now stand high above the market square in Rjukan.

Twelve years after he first dreamed of his Solspeil, a German company that specializes in CSP  concentrated solar power  brought in, by helicopter, the three 17-square-metre glass mirrors that are now high above the market square in Rjukan.
