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Always been curious about this - wont nuclear plants increase thermal input of earth ? True for fossil fuels too which were never burnt in such vast quantity

These energy sources are outside of solar energy so how much more can they warm up the earth ?

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All energy produced in any type of power plant eventually becomes heat. Fossil fuels have the additional property of making Earth retain more of it.

Solar could also increase the temperature if it traps energy that would otherwise be immediately reflected back to space. I'm not sure if the difference is significant, though, compared to the effect of greenhouse gases.

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