> I don’t understand why Bitcoin mining is incompatible with emissions reduction. It sounds like an additional source of demand may make economical plants that otherwise could not be built.

Some years ago, there was a book published where the author systematically looked at the energy consumption (not just the of the UK and compared it to the total possible renewable energy sources therein. He found that even if you covered every hectare of the UK with solar panels, sent every raindrop through hydro power plants to extract energy as it runs to the sea, etc., it still would not provide enough renewable energy to satisfy UK consumption.

Switching existing energy sources to renewable isn't sufficient to avoid climate change; we need to reduce aggregate energy consumption. And that means that Bitcoin mining, adding a massive energy sink where one did not previously exist, is doing the exact opposite of what needs to be done.