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>solar surpassed fossil fuels in efficiency

What does this even mean? What inputs and outputs are you comparing to get an apples-to-apples comparison between efficiency between fossil fuels and solar?

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It's talking about the economic inputs required to create a unit of energy. Literally all you have to fathom is "can we add up what it takes to make a watt of energy from coal, vs. from solar power vs. some other plant, amortized over the lifetime of said plant?"

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