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Power system based wholly on renewables can work

I HOPE that Brian Wilson (Letters, February 12) is wrong, as wind power has to be a critical element in the strategy to wean civilisation off fossil fuels and mitigate global warming.

That the global climate is in danger is evident in the disappearing ice in the Arctic – arguably the canary in the mine pointing to the presence of serious and unnatural global warming.

Mr Wilson states that wind power is a green myth because output is unreliable, being available only 25% of the time. This is true only of a single wind farm. Farms at opposite ends of the country operating at different times in different winds could have an aggregated output of 50%. Farms spread over the continent could in theory be generating power 100% of the time if enough were built. However, this need not be necessary.
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