Though the EU as a whole maintains a balanced energy mix, with supply divided relatively evenly among gas, coal, oil, renewables, and nuclear generation, individual countries are often excessively dependent on a single source and, more dangerously, a single supplier: Russia. Unrestricted energy flows within the EU would mitigate the risks of supply disruptions or shocks.
内部能源市场还将增强欧洲的能源安全。尽管欧洲总体保持着平衡的能源组成，供给在天然气、煤炭、石油、可再生能源和核能之间的配比相对均匀，但个体国家通常过分依赖于某种能源，甚至（更加危险地）依靠单一供给国：俄罗斯。不受限制的欧盟内部能源流将坚强供给干扰或冲击的风险。