Ukraine's energy sector faces unprecedented challenges, from a heavy reliance on expensive fossil-fuel imports to inefficient infrastructure and markets. Yet there is also potential for Ukraine to experience an energy revolution, one that could boost employment, lift economic growth and enhance energy security. Modernisation of Ukraine's energy-supply sectors has only begun and will require investment on a huge scale, complemented by a fundamental reform of the business environment. A strong dependency on oil and gas imports and often-inefficient energy production, transportation and supply se.