Which is what leads to our interesting problem: the margin for error, the gap between the entire system working at full output and potential peak demand is going to be only 4% of that peak demand.

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Investors seem to think so, as it continues trading near its peak, but there are some potential pitfalls.

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This is true also of gallium, tellurium and selenium, since all of them are past their production peak, which forewarns of imminent potential production shortages and escalating prices.

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The Holyrood government said Scotland had the potential to generate up to 60GW of electricity from renewable sources, 10 times its peak demand.

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