Ukraine and Russia have long - standing feud over gas supply lines . Ukraine is big importer of Russian gas , while Russia relies on Ukraine pipeline . In recent years , Ukraine has tried to diversify its energy supply to reduce costs . Early this year Ukraine -- along with much of eastern Europe -- was caught in a deep and protracted cold snap . Liquid gas imports , underground shale gas and green energy are among new projects .
Ukraine and Russia have long - standing feud over gas supply lines . Ukraine is big importer of Russian gas , while Russia relies on Ukraine pipeline . In recent years , Ukraine has tried to diversify its energy supply to reduce costs . Liquid gas imports , underground shale gas and green energy are among new projects .