On December 31, Ukraine will cease the transit of Russian gas to Europe, a move announced by President Volodymyr Zelensky. This decision, while aimed at reducing dependence on Russian energy, will result in significant revenue loss for Ukraine. Eastern European countries, particularly Slovakia, dependent on Russian gas, are likely to face challenges. The EU is increasing imports of American liquefied natural gas (LNG) but it may not fully compensate for the loss of Russian supplies. Economic experts warn of rising gas prices amidst these changes.