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Then you need to count the whole refining process that goes in making usable petrol, too. This is not totally unique to nuclear.

Of course you also need to count that. But accounting for extraction and refining adds something like 20% to fossil fuel emissions, whereas it's claimed to vastly increase total nuclear emissions.

Sure, but this is a percents vs quantities problem. If nuclear has almost zero emissions in power production even the smallest increase will look like a massive increase percentage wise. It still may compare very favorably to fossil fuels for lifecycle emissions.

The original comment linked to https://www.stormsmith.nl/i05.html which claims that, when you account for the full lifecycle, CO2 emissions from nuclear are comparable to CO2 emissions from coal. If true, then no, it's not a percents vs quantities problem, it's just a quantities problem.

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