A Nuclear Solution to Climate Change?

Abstract

The U.N. Framework Convention on Climate Change calls for the stabilization of greenhouse gas concentrations at a level that would prevent dangerous changes in climate. An ambitious target would be stabilization at an equivalent doubling of the preindustrial CO2 concentration. To achieve this, fossil-fuel carbon emissions in 2050 should not exceed their current level, despite an expected doubling or tripling in world demand for energy. Lacking a crystal ball that tells us the future, we simply select one possible scenario that achieves the emissions target. We assume that by 2050, world population and average per-capita energy consumption each rise by 50%, with annual world primary energy consumption reaching 900 EJ (exajoules, 1018 joules). A roughly equal contribution of 300 EJ each is assumed for conventional fossil fuels, for renewable and "decarbonized" fossil fuel sources, and for nuclear fission. This is a challenging scenario, especially because restraining the increase in average per-capita energy consumption in the face of the economic aspirations of developing countries will require substantial improvements in energy efficiency.

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