It just means that ceteris paribus nuclear energy, which relies on uranium, provides an added layer of protection against geopolitical supply risks. The following graph shows the reserve-production (R/P) ratios for key energy resources (Figure 1.3). The R/P ratios indicate the number of years that currently known (“proved”) reserves that can be recovered with reasonable certainty in the future under existing economic and technical conditions would last at current levels of consumption.