Threat of war with Ukraine has led to fears of gas shortages in Europe, but there are alternative suppliesRising tensions on the Russia-Ukraine border have raised fears that Europe’s gas supply crisis could become far more serious. Gas market prices have already surpassed record highs and threaten to saddle European households with a cost of living crisis.Russia is Europe’s largest supplier of gas, of which a third flows through Ukraine’s gas pipelines to countries across the continent.