Ukrainian transit gas deal to Europe ended on Jan. 1. For now, the most acute effects are being felt in a region called Transnistria, on the eastern edge of Moldova.

The ongoing conflict has highlighted the importance of diversifying gas supplies to build resilience against geopolitical risks.

With transit routes through Ukraine for Russian gas cut off, a few EU countries now need to rethink their gas supply. For others – including Germany and Switzerland – the impact will be minimal.

Russian natural gas flows to Europe across Ukraine appear poised to halt Wednesday, after a transit deal expires, raising the stakes for the continent’s energy security as it draws heavily on reserves.

Ukraine loses billions in gas transit fees, Europe faces soaring energy prices, with Russia largely insulated from the fallout