Nuclear's lifecycle emissions are low according to IPCC and UNECE. The IEA considers nuclear a low-emission technology useful for energy security and decarbonisation, especially in systems needing stable generation. The climate effect depends, however, on cost, timescales, and what is actually replaced: a reactor replacing coal avoids far more emissions than one replacing other low-carbon electricity.
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97.
Can nuclear energy help reduce global emissions?
Yes, if it replaces fossil fuel sources or avoids new fossil generation.
