боль :Though it became politically toxic after the crisis in Ukraine, the pipeline made sense for countries such as Serbia, Bulgaria and Hungary because it offered a supply of gas that did not pass through Ukraine and so was at less risk of disruption.решение:The most viable Western-backed option, the Nabucco pipeline to bring gas from the Caspian Sea through Turkey to Bulgaria and on to Austria, was shelved in part because there was not enough demand to sustain both it and South Stream.