about 12 percent of the world’s power is currently supplied by nuclear energy, much of it coming from reactors that are old and obsolete.33 From a climate perspective, it would certainly be preferable if governments staggered their transitions away from high-risk energy sources like nuclear, prioritizing fossil fuels for cuts because the next decade is so critical for getting us off our current trajectory toward 4–6 degrees Celsius of warming. That would be compatible with a moratorium on new nuclear facilities, a decommissioning of the oldest plants and then a full nuclear phase-out once
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