Assume that in a given scenario with no significant increase in nuclear power usage and gradually increasing reliance on renewables over the next century, atmospheric CO² levels reach a maximum of 700 ppmv and then stabilize. Now assume that this scenario is varied by building a thousand 1 GW nuclear power plants at a steady rate over the next century. Estimate the decrease in radiative forcing and average surface temperatures assuming that these nuclear plants replace coal power plants. How would you compare the risks and environmental hazards associated with the nuclear power plants against the risks posed by the marginal warming offset by the nuclear plants?