New nuclear fission power plants can generate energy inexpensively because they achieve high temperatures, opening up more options. Hot heat can reduce the costs of hydrogen to $1/kg using technologies such as the copper-chlorine cycle or solid oxide electrolysis cells.
The ocean absorbs atmospheric CO2 to a density 140 times that in air. A seaside fission power plant can capture CO2 from flowing seawater, then combine CO2 with H2 generated on site. Burning the fuel returns CO2 previously captured.
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