But once it is analysed through the prism of security of energy supply, public attitudes are more encouraging. Having shown that nuclear can make a positive contribution to the security of energy supply, the object of this chapter was to identify the issues and indicators of how consumers assess their own views of security of supply. However, in the case of import dependency, for example, opinions are sometimes more difficult to perceive if only one indicator is used, even if it is simple, such as the import ratio.