A third of Europe's natural gas comes from Russia, most of it through Ukrainian pipelines. Russia has used the gas as a weapon before, to gain the upper hand in conflicts with its neighbors.
But the relationship cuts both ways, with over half of Russia's federal budget dependent on energy imports.
Phil Flynn, energy market analyst with Price Futures Group, joins Here & Now's Robin Young to discuss Russia and Europe's mutual dependency on natural gas.
This segment aired on March 5, 2014.