The array itself is a steel hoop around 20 inches in diameter, the surface of its aperture teeming with rectangular rods.

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Each time you migrate in diameter, you dramatically expand the surface area of the wafer.

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The tungsten dust contemplated here would be about 30 micro-meters in diameter, and be released at a point 1100 km above the surface of the Earth.

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The heat exchangers and pipework required to make a 10MW plant already exist, but the 100MW facility will need a pipe that is not only 1km long (in order to reach the cold water at depth) but ten metres in diameter (in order to bring enough of that cold water to the surface).

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If approved by Lancashire County Council the well will be 8.5in (22cm) in diameter and extend approximately 1km from the current vertical well, more than a mile beneath the surface.

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