Some optimists believe that if the trend is allowed to evolve into its next phase—from low-carbon natural gas to zero-carbon nuclear energy, a process abbreviated as “N2N”—the climate will have a soft landing. But only the sunniest believe this will happen by itself. Annual CO2 emissions may have leveled off for the time being at around 36 billion tons, but that’s still a lot of CO2 added to the atmosphere every year, and there is no sign of the precipitous plunge we would need to stave off the harmful outcomes. Instead, decarbonization needs to be helped along with pushes from policy and
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