This case study examines the sustainability of Ukraine's energy system. It identifies several key issues including: 1) a Soviet-era mindset of overconsumption of free resources with little regard for the environment; 2) a lack of understanding of energy measures and innovation; and 3) economic problems like shadow markets, short-term planning, and political interference. Additional problems covered include high capital asset aging, resource import reliance, low renewable usage, transmission losses, overconsumption, and non-payment for services. The conclusion is that Ukraine's energy system suffers from diverse social, economic, ecological, technological and political problems and cannot currently be considered sustainable.